Patent Publication Number: US-10789023-B2

Title: Control method for information processing apparatus, information processing apparatus, and non-transitory computer-readable medium

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a control method for an information processing apparatus, an information processing apparatus, and a non-transitory computer-readable medium. 
     Description of the Related Art 
     Conventionally, there are known N-in-1 setting and booklet print setting as the functions of a print application or a printer driver. In booklet printing or the like, a blank page is allocated automatically in accordance with allocation of images. 
     On the other hand, there is known a method of displaying a print preview screen for a plurality of pages. For example, Japanese Patent Laid-Open No. 2010-176709 discloses a method in which when generating print data for a plurality of pages forming a printing product, a preview screen is displayed by considering that the order of the pages in the printing product is different from the order (layout) of images output as printed materials. 
     In the above-described function, the plurality of pages forming the printing product may include a blank page unintended by a user. If such inserted blank page is unintended by the user and the user executes printing without noticing it, a useless printed material is output resultantly. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in consideration of the above problem and prevents printing of a plurality of pages including a blank page unintended by the user. 
     According to one aspect of the present invention, there is provided a control method for an information processing apparatus, comprising: editing, based on a user instruction, a plurality of pages which are displayed on a display unit of the information processing apparatus and on which images designated by a user can be laid out; making, if the plurality of pages include a blank page on which no image is laid out, a notification to the user; and generating, based on a result of the editing, print data for printing the plurality of pages. 
     According to another aspect of the present invention, there is provided an information processing apparatus comprising: an editing unit configured to edit, based on a user instruction, a plurality of pages which are displayed on a display unit of the information processing apparatus and on which images designated by a user can be laid out; a notification unit configured to make, if the plurality of pages include a blank page on which no image is laid out, a notification to the user; and a generation unit configured to generate, based on a result of the editing, print data for printing the plurality of pages. 
     According to another aspect of the present invention, there is provided a non-transitory computer-readable medium storing a program for causing a computer to execute a method, comprising: editing, based on a user instruction, a plurality of pages which are displayed on a display unit of the computer and on which images designated by a user can be laid out; making, if the plurality of pages include a blank page on which no image is laid out, a notification to the user; and generating, based on a result of the editing, print data for printing the plurality of pages. 
     According to the present invention, it is possible to prevent printing of a plurality of pages including a blank page unintended by the user. 
     Further features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the attached drawings). 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram showing an example of a system arrangement and examples of the hardware arrangements of apparatuses; 
         FIG. 2  is a block diagram showing an example of the software arrangement of the information processing apparatus; 
         FIG. 3  is a view showing an example of the basic setting screen of a bookbinding application; 
         FIG. 4  is a view showing an example of an edit screen in the bookbinding application; 
         FIG. 5  is a view showing an example of the edit screen in the bookbinding application; 
         FIG. 6  is a view showing an example of the edit screen in the bookbinding application; 
         FIG. 7  is a view showing an example of the edit screen in the bookbinding application; 
         FIG. 8  is a view showing an example of the edit screen in the bookbinding application; 
         FIG. 9  is a view showing an example of the edit screen in the bookbinding application; 
         FIGS. 10A and 10B  are views for explaining the layout of pages in booklet printing; 
         FIG. 11  is a view for explaining an example in which blank pages are included in booklet printing; 
         FIG. 12  is a flowchart of processing according to the first embodiment; 
         FIG. 13  is a view showing an example of notification of a blank page according to the first embodiment; 
         FIG. 14  is a view showing an example of notification of a blank page according to the first embodiment; 
         FIGS. 15A, 15B, and 15C  are views each for explaining an example of a layout according to the first embodiment; 
         FIGS. 16A, 16B, and 16C  are views each for explaining an example of a layout according to the first embodiment; 
         FIGS. 17A, 17B, and 17C  are views each showing a display example of a preview screen according to the second embodiment; and 
         FIGS. 18A and 18B  are views each showing a display example of a preview screen according to the third embodiment. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     Embodiments of the present invention will be described below with reference to the drawings.   
     (System and Apparatus Arrangements) 
     An example of a system arrangement according to this embodiment will be described with reference to  FIG. 1 . This system includes an information processing apparatus  101  and a printing apparatus  151  and executes print processing by sending print data prepared by the information processing apparatus  101  to the printing apparatus  151  via a network. Note that communication between the information processing apparatus  101  and the printing apparatus  151  can be performed via an access point  131  by, for example, a wireless LAN complying with the IEEE802.11 standard series. Note that although an embodiment based on a network arrangement using the access point  131  will be described below, another arrangement in which the information processing apparatus  101  and the printing apparatus  151  are communicable with each other may be used. For example, the information processing apparatus  101  and the printing apparatus  151  may be connected via a wired line (not shown). Furthermore, an apparatus having both the function of the information processing apparatus  101  and the function of the printing apparatus  151  may be used. In this case, information can be exchanged between the information processing apparatus  101  and the printing apparatus  151  via buses in the apparatuses and the like. A plurality of blocks shown in  FIG. 1  may be integrated into one block and one block may be divided into a plurality of blocks. In addition, a block other than those shown in  FIG. 1  may be added, and one or more of the blocks shown in  FIG. 1  may be omitted. 
     The information processing apparatus  101  is an arithmetic apparatus capable of converting print target data into print data, such as a personal computer (PC), a smartphone, a mobile terminal, a notebook PC, a tablet terminal, or a PDA (Personal Digital Assistant). The printing apparatus  151  is an arbitrary printer capable of executing print processing by obtaining print data from an external apparatus such as the information processing apparatus  101 . Assume that the printing apparatus  151  executes printing by the inkjet method in this embodiment. However, for example, the printing apparatus  151  may execute printing by another arbitrary method such as an electrophotographic method. The printing apparatus  151  may be a Multi Function Peripheral having a plurality of functions such as a copy function, a FAX function, and a print function. 
     The information processing apparatus  101  includes, for example, an input interface  102 , a CPU  103 , a ROM  104 , a RAM  105 , an external storage device  106 , an output interface  107 , a communication unit  109 , and a short-range wireless communication unit  110 . CPU, ROM, and RAM are acronyms for “Central Processing Unit”, “Read Only Memory”, and “Random Access Memory”, respectively. The computer of the information processing apparatus  101  is formed by the CPU  103 , the ROM  104 , the RAM  105 , and the like. Note that although  FIG. 1  shows an example case in which the information processing apparatus  101  displays information on a display device (display unit  108 ) such as an external display, the information processing apparatus  101  may include the display unit  108 . 
     The input interface  102  is an interface for receiving a data input and an operation instruction from a user. The input interface  102  is formed by, for example, a physical keyboard, buttons, a touch panel, or the like. Note that the output interface  107  (to be described later) and the input interface  102  may be integrated so that output of a screen and reception of an operation from the user are performed using common hardware. 
     The CPU  103  serves as a system control unit, and controls the overall information processing apparatus  101 . The ROM  104  stores permanent data such as control programs to be executed by the CPU  103 , data tables, and an embedded operating system (to be referred to as an “OS” hereinafter) program. In this embodiment, the control programs stored in the ROM  104  perform software execution control such as scheduling, task switching, and interrupt processing under the management of the embedded OS stored in the ROM  104 . The RAM  105  is implemented by an SRAM (Static Random Access Memory) or the like that needs a backup power supply. Note that the RAM  105  holds data by a primary battery (not shown) for data backup and can thus store important data such as program control variables without volatilizing them. The RAM  105  can be provided with a memory area to store setting information and management data of the information processing apparatus  101 , and the like. The RAM  105  can also be used as the main memory and work memory of the CPU  103 . 
     The external storage device  106  saves an application for providing a print execution function, a print information generation program for generating print information interpretable by the printing apparatus  151 , and the like. The external storage device  106  can also save various programs such as a control program for sending/receiving information to/from another apparatus (for example, the printing apparatus  151 ) connected via the communication unit  109 , and various kinds of information to be used by these programs. 
     The output interface  107  is an interface used by the display unit  108  to perform control for displaying data and presenting information of the state of the information processing apparatus  101 . The output interface  107  outputs control information and display target information for causing the display unit  108  to display the information. The display unit  108  includes an LED (Light Emitting Diode) and LCD (Liquid Crystal Display) and displays data and notifies the user of the state of the information processing apparatus  101 . Note that a software keyboard including keys such as numerical value input keys, a mode setting key, an enter key, a cancel key, and a power key may be displayed on the display unit  108 , and an input from the user may be received via the software keyboard. 
     The communication unit  109  includes a radio frequency (RF) circuit and a baseband circuit for executing data communication by performing connection to an external apparatus such as the printing apparatus  151 . For example, the communication unit  109  can communicate with the printing apparatus  151  via the access point  131  existing separately from the information processing apparatus  101  and the printing apparatus  151 . The access point  131  can be, for example, a device such as a wireless LAN router that operates in accordance with a wireless communication method complying with the IEEE802.11 standard series. Furthermore, the communication unit  109  may establish direct connection to the printing apparatus  151  in accordance with a protocol such as Wi-Fi (Wireless Fidelity) Direct®. If the printing apparatus  151  includes an access point (not shown), the communication unit  109  may be connected to the access point to establish direct connection to the printing apparatus  151 . Note that the communication unit  109  can be configured to perform communication by WiFi® but may perform communication by another wireless communication method such as Bluetooth®. 
     The short-range wireless communication unit  110  executes data communication by establishing wireless connection to the short-range wireless communication unit  157  of the printing apparatus  151  based on at least the fact that the printing apparatus  151  (external apparatus) enters a predetermined short-range area. The short-range wireless communication unit  110  performs communication by a communication method different from that of the communication unit  109 , such as Bluetooth Low Energy (BLE) or Near Field Communication (NFC). 
     The printing apparatus  151  includes, for example, a ROM  152 , a RAM  153 , a CPU  154 , a print engine  155 , a communication unit  156 , and a short-range wireless communication unit  157 . 
     The communication unit  156  includes a radio frequency (RF) circuit and a baseband circuit for performing connection to an external apparatus such as the information processing apparatus  101 . The communication unit  156  corresponds to the communication unit  109  of the information processing apparatus  101  and performs communication by a wireless communication method such as Wi-Fi or Bluetooth. The communication unit  156  may be directly connected to the communication unit  109  of the information processing apparatus  101  by functioning as an access point or in accordance with a predetermined protocol, as described above, or may be connected to the communication unit  109  via the external access point  131  or the like. If the communication unit  156  functions as an access point, the communication unit  156  may have hardware for functioning as an access point or may use software that allows the communication unit  156  to function as an access point. Note that although the information processing apparatus  101  and the printing apparatus  151  are connected to the one access point  131  in the example of  FIG. 1 , they may be connected to different access points connected to the network and may be connected to each other via the network. 
     The short-range wireless communication unit  157  executes data communication by establishing wireless connection to the short-range wireless communication unit  110  of the information processing apparatus  101  based on at least the fact that the information processing apparatus  101  (external apparatus) enters a predetermined short-range area. The short-range wireless communication unit  157  corresponds to the short-range wireless communication unit  110  of the information processing apparatus  101  and performs communication by a wireless communication method such as BLE. Note that, for example, print information sent from the information processing apparatus  101  or the like has a large amount of data, requires high-speed large-capacity communication, and is thus received via the communication unit  156  capable of performing communication at a speed higher than that of the short-range wireless communication unit  157 . 
     The RAM  153  is a memory similar to the RAM  105 . The RAM  153  is provided with a memory area to store setting information and management data of the printing apparatus  151 , and the like. The RAM  153  is also used as the main memory and work memory of the CPU  154 , functions as a reception buffer for temporarily saving print information received from the information processing apparatus  101  or the like, and also saves various kinds of information. The ROM  152  stores permanent data such as control programs to be executed by the CPU  154 , data tables, and an OS program. When the CPU  154  executes the control programs stored in the ROM  152 , software execution control such as scheduling, task switching, and interrupt processing can be executed under the management of the embedded OS stored in the ROM  152 . The CPU  154  serves as a system control unit and controls the overall printing apparatus  151 . Note that a memory such as an external HDD or SD card may be mounted as an optional device on the printing apparatus  151 , and the information saved in the printing apparatus  151  may be saved in such memory. 
     The print engine  155  forms an image on a print medium such as a sheet using a recording material such as ink based on the information saved in the RAM  153  and the print information received from the information processing apparatus  101  or the like, and outputs a print result. 
       FIG. 2  is a block diagram showing an example of the functional arrangement of the information processing apparatus  101 . The information processing apparatus  101  includes, for example, as functional components, a bookbinding application  201  that executes processing (to be described later), and a printer driver  202  that generates print data interpretable by the printing apparatus  151 . When the user inputs a print instruction to the screen of the bookbinding application  201  (to be described later), the printer driver  202  receives application data output from the bookbinding application  201  and generates print data. Then, when the printer driver  202  sends the print data generated by the bookbinding application  201  to the printing apparatus  151 , the printing apparatus  151  executes print processing. 
     (Overview of Operation of Bookbinding application) 
     Subsequently, an example of the procedure of an operation executed by the above-described bookbinding application  201  will be described.  FIG. 3  shows an example of a basic setting screen displayed on the display unit  108  when the CPU  103  of the information processing apparatus  101  executes, for example, programs corresponding to the bookbinding application  201  stored in the ROM  104  and the external storage device  106 . As an example, a basic setting screen  300  includes a post-printing image  301 , a printer selection region  302 , a sheet size selection region  303 , a binding method setting region  304 , a binding direction setting region  305 , and a cover sheet-related setting region  306 . 
     The printer selection region  302  is a region where a printing apparatus to be used is selected. When a pull-down button in the printer selection region  302  is pressed by a user operation, a list of printing apparatuses usable by the information processing apparatus  101  is displayed, and the user can select a printing apparatus to be used to create a booklet by the bookbinding application  201 . Note that with respect to the list of the printing apparatuses displayed when the pull-down button in the printer selection region  302  is pressed, only printing apparatuses supportable by the bookbinding application  201  can be displayed. However, the present invention is not limited to this. For example, all the printing apparatuses usable by the information processing apparatus  101  may be displayed regardless of whether they can be supported by the bookbinding application  201 . 
     The sheet size selection region  303  is a region where a sheet size to be used for printing is selected. When a pull-down button in the sheet size selection region  303  is pressed by a user operation, a list of sheet sizes usable by the printing apparatus selected in the printer selection region  302  is displayed. The user can select, from the displayed list of the sheet sizes, one size corresponding to the size of a booklet to be created. Note that information of the sheet sizes usable by the printing apparatus selected in the printer selection region  302  can be obtained from the printing apparatus via, for example, the printer driver  202 . 
     The binding method setting region  304  is a region where a binding method of a booklet is set. When a pull-down button in the binding method setting region  304  is pressed by a user operation, for example, “side stitch” and “saddle stitch” are selectably displayed. “Side stitch” is a binding method of performing printing by attaching a binding material such as a staple at a position a predetermined distance away from a spine portion of a booklet. “Saddle stitch” is a binding method of performing printing by attaching a binding material such as a staple to a folding portion of doubled sheets. If “saddle stitch” is selected, it is assumed that the sheets are doubled, and thus a 2-in-1 print setting can be selected automatically. Note that if “saddle stitch” is selected, for example, settings such as 4-in-1 other than 1-in-1 may be selectably displayed. Note that if “side stitch” is selected, a 1-in-1 print setting can be selected automatically. In this case as well, however, settings such as 2-in-1 and 4-in-1 may be selectably displayed. Note that if 2-in-1 is not selected for “saddle stitch” or if 1-in-1 is not selected for “side stitch”, page allocation (to be described later) is different accordingly. Note also that the N-in-1 print setting is a print setting for printing N images based on N image data on a sheet (one sheet) for one page. 
     The binding direction setting region  305  is a region where a binding direction of a booklet is set. When a pull-down button in the binding direction setting region  305  is pressed by a user operation, for example, “right-side binding” and “left-side binding” are selectably displayed. In some cases, “upper binding” may be selectably displayed. “Right-side binding” indicates a binding direction that binds the right side of the front cover, and “left-side binding” indicates a binding direction that binds the left side of the front cover. In addition, “upper binding” indicates a binding direction that binds the upper portion of the cover. A string “binding direction” in the binding direction setting region  305  may be replaced by “open direction” or the like. The rightward corresponds to right-side binding and the leftward corresponds to left-side binding. The setting in this region determines whether the pages of a booklet to be created advance from right to left or from left to right. 
     The cover sheet-related setting region  306  is a region where a cover sheet is set. For example, radio buttons that allow the user to select one of an item for creating covers and text by the same type of sheets and an item for creating covers and text by different types of sheets are displayed. Note that if, in the setting region  306 , the covers and text are created by the same type of sheets, the sheet type (for example, “normal paper” or the like) of the text is set as the sheet type of the covers, and thus the region that allows selection of the sheet type of the covers is grayed out so as not to be selected. On the other hand, if the setting of creating covers and text by different types of sheets is selected in the setting region  306 , the region that allows selection of the sheet type of the covers is activated. Then, when a pull-down button in the region where the sheet type of the covers is set is pressed, a list of selectable sheet types (for example, glossy paper, normal paper, and the like) is displayed. Note that, for example, if “normal paper” is selected, a character string “borderless printing is impossible” can be displayed. Alternatively, if a sheet type (for example, “glossy paper”) except for “normal paper” is selected, a character string “borderless printing is possible” can be displayed. This is because printing can be executed on normal paper using a recording material containing a pigment but borderless printing cannot be executed in printing using a recording material containing a pigment. In addition, necessary information may be set for each sheet type, and a character string corresponding to the sheet type selected by a user operation may be displayed. Furthermore, if the setting of creating covers and text by different types of sheets is selected, a message such as “it is necessary to print by setting different sheets for cover/text” may be displayed. 
     When “OK” is pressed in the basic setting screen shown in  FIG. 3 , the screen transitions to an edit screen. The edit screen is a screen for editing each page by receiving a user instruction. Print data for printing each page is generated based on a result of editing in the edit screen. The edit screen may be different in accordance with the setting items such as the binding method and the setting of whether the sheet type of the covers is set to be the same as that of the text. Examples of the edit screen corresponding to the basic settings will be described below. 
     [Case in which Side Stitch is Selected and Covers and Text are Created by Same Type of Sheets] 
       FIG. 4  shows an example of the edit screen when the binding method is side stitch (1-in-1), right-side binding is selected, and the setting of using the same type of sheets for the covers and text is made. Note that the example of  FIG. 4  shows an example of a state in which eight (from original data representing an image in which “A” is written to original data representing an image in which “H” is written) original data (image data) have already been loaded. In a stage before original data are loaded, an edit region  401  and an original data region  402  are in a predetermined state (for example, a blank state) in which the user can recognize that no original data have been loaded. Note that in, for example, the stage before the original data are loaded, a message such as “please load original data to be put in a booklet” may be displayed in the edit region  401 , and a message that notifies the user of a method of loading data may further be displayed. Note that such message may be displayed in the original data region  402 . Another method such as display of a dialog may be used to prompt the user to load original data. 
     When the user clicks on a “load” button  403 , for example, a file selection dialog is displayed, and the user selects, from a displayed file list, a file to be used to create a booklet. When a file is selected, contents of the file (original data included in the file) are expanded in the original data region  402 . Furthermore, when a file is selected, a result of performing automatic page allocation as processing of automatically allocating (linking) original data included in the file to pages to be printed can be displayed in the edit region  401 . Note that in automatic page allocation, specific original data to be allocated to a specific page may be arbitrarily decided. Assume that numbers are assigned to the original data and original data having a smaller number is allocated to a page having a smaller number. The edit region  401  shown in  FIG. 4  shows an example of a case in which automatic page allocation is performed in this way. In the expanded file, original data as the first original data representing an image in which “A” is written is set in the front cover as the first page. Then, original data as the second original data representing an image in which “B” is written is set in the back cover as the second page. Original data as the third original data representing an image in which “C” is written is set in the inside of the front cover as the third page, and original data as the fourth original data representing an image in which “D” is written is set in the inside of the back cover as the fourth page. Note that the numbers of pages other than the back cover and its inside may be smaller than those of the back cover and its inside. That is, the first and second original data in the file may be allocated to “front cover” and “inside of front cover”, respectively. The last original data and the second original data from the last in the file may be allocated to “back cover” and “inside of back cover”, respectively. Note that  FIG. 4  and some following examples show an example of a case in which right-side binding is selected, and the front cover is displayed at the rightmost end and the back cover is displayed at the leftmost end. However, if left-side binding is selected, the front cover is displayed at the leftmost end and the back cover is displayed at the rightmost end. 
     Note that when the contents of the file are expanded in the original data region  402 , for example, a confirmation message such as “do you want to perform automatic page allocation?” may be displayed to receive user determination of whether to automatically perform page allocation. In this case, if the user approves automatic page allocation, a result of performing automatic page allocation is displayed in the edit region  401 ; otherwise, the edit region  401  may remain blank. Alternatively, the contents of the selected file may only be expanded in the original data region  402  without performing automatic page allocation regardless of user determination. Note that even if automatic page allocation is not performed, when the user clicks on an “add all” button  404 , automatic page allocation of the original data expanded in the original data region  402  can be performed. Note that the user can perform manual page allocation by dragging and dropping, in the edit region  401 , the original data expanded in the original data region  402 . That is, the user can arbitrarily decide a specific original data to be allocated to a specific page. Note that manual page allocation may be executed in a state in which no automatic page allocation has been performed or may be executed to change contents of allocation after automatic page allocation is performed. 
     Note that when a plurality of files are read out, all contents of the plurality of files are expanded in the original data region  402 . At this time, the order of the original data to be expanded can be decided by a pull-down menu  405 . For example, if, as shown in  FIG. 4 , “load order” is selected, the data are expanded in the original data region  402  in an order such that data of a file selected earlier and thus loaded earlier is displayed on the left side. To the contrary, if, for example, “file name order” (not shown) is selected, the data are expanded in ascending (descending) order of file names. If, for example, a file whose name is “A.pdf” is opened after a file whose name is “B.pdf”, when “load order” is selected, data of “A.pdf” is displayed on the right side of a position at which data of “B.pdf” is displayed. On the other hand, if “file name order” is selected, even if “B.pdf” is opened first, the data of “B.pdf” is displayed on the right side of a position at which the data of “A.pdf” is displayed. Note that the sort order is not limited to the load order or the file name order, and various orders such as the order of the file creation date (update date), the order of the use frequency in this application, and the order of the file capacity can be used. Note that the example in which the data of the pdf form are loaded has been explained but the present invention is not limited to this. For example, data of the jpg form may be loaded. Furthermore, a plurality of original data corresponding to a plurality of pages may be included in one data of pdf form. If data of the pdf form including a plurality of original data is loaded, the plurality of original data included in the data of the pdf form are discriminated and expanded in the original data region  402 . The order of expansion of the original data is a page order defined in the data of the pdf form. 
     In the edit region  401 , sheet regions (medium regions)  417  each indicating the size of a print medium on which each page is printed and images represented by the original data allocated to the respective pages are displayed. The sheet regions  417  are displayed in the edit region  401  in the page order of the booklet after completion. Furthermore, display is performed so that the distance between two pages included in a double-page spread is shorter than the distance to another page that is adjacent but forms no double-page spread. This allows the user to readily determine a page forming a double-page spread and a page forming no double-page spread. Note that the double-page spread indicates pages for printing one image represented by one original data to span two pages. Therefore, two pages included in a double-page spread are pages that are adjacent to each other and are printed on different sheets. In the example of  FIG. 4 , when the distance between the page where “C” is written and the page where “E” is written is sufficiently short, it is understood that these pages have the spread relationship. On the other hand, when the distance between the page where “E” is written and the page where “F” is written is relatively longer than that between the page where “C” is written and the page where “E” is written, it is understood that these pages are adjacent to each other but have no spread relationship. In this way, all the pages included in the booklet are displayed in the edit region  401 . Note that the example of  FIG. 4  shows an example of a case in which all the pages included in the booklet can be displayed as a whole. However, if the number of pages increases while maintaining the state in which all pages are displayed, the size of each page may become small. To cope with this, the bookbinding application can be configured to perform enlargement/reduction display of each page. At this time, if all the pages cannot be displayed in the edit region  401 , a display area can be moved by, for example, displaying a scroll bar in the lower portion of the edit region  401 . 
     Note that if side stitch is selected, binding positions  406  at which sheets on which images displayed in the edit region  401  are printed are bound by binding materials such as staples are also displayed in the sheet regions. The binding positions  406  can be displayed in the pages by, for example, a predetermined color (for example, red) so that the user can recognize them. The binding positions  406  can be printed intact as they are displayed in the sheet regions. This allows the user to grasp the positions at which staples are to be attached when binding the booklet. Note that the binding positions  406  may be printed on the front cover and the back cover and may not be printed on the remaining pages. The binding material for binding the booklet is not limited to a staple, and may be, for example, a string or plastic band. In addition, when designation of the layout positions of the binding positions  406  in the sheet regions is received from the user, the binding positions  406  can be located at arbitrary positions. 
     In each sheet region  417  displayed in the edit region  401 , a print region  407  indicating a region where an image can be printed is displayed. A line indicated by the print region  407  in  FIG. 4  indicates the boundary between the print region and a margin region where a margin is always provided (that is, no image is printed without fail). When the user inputs each setting value in a region of page setting  408 , the original data is laid out in the sheet region  417  based on the setting values. For example, in the page setting  408 , the user sets the enlargement/reduction method of each image laid out in the edit region  401 . More specifically, if “according to margin” is selected, each image is enlarged/reduced to fit in with the print region  407 . If “according to sheet” is selected, each image is enlarged/reduced to fit in with the sheet region  417 . If “full scale” is selected, each image is displayed in the actual size without enlargement/reduction. Note that a portion of each image that extends outside the print region  407  is not printed and is thus displayed translucently. For example, the user sets the position of each image in the page setting  408 . If, for example, a negative value is input as the vertical or horizontal position of the image, the position of the image laid out in the sheet region  417  is moved upward or leftward. Alternatively, if a positive value is input as the vertical or horizontal position of the image, the position of the image laid out in the sheet region  417  is moved downward or rightward. This allows the user to set in detail how the image represented by the original data is laid out in the sheet region  417 . Note that these settings can be applied for each page. For example, in the state in which the page where “E” is written is selected in the edit region  401 , when the setting values are input in the page setting  408 , the setting values are applicable to only the selected page. Note that when “apply to all pages” is selected in the page setting  408 , the input settings are collectively applied to all the pages. Note that at this time, the user can recognize the currently selected page when the frame of the sheet region  417  corresponding to the page where “E” is written is highlighted as a page frame  409 . In addition, the user can delete the selected page from the edit region  401  by pressing, for example, an icon  410 . 
     The user can allocate one original data to span two pages by selecting a “spread” checkbox  415 . An operation of changing a page forming no double-page spread to a page forming a double-page spread by selecting the “spread” checkbox  415  is called “spreading”.  FIG. 5  shows a display example when the “spread” checkbox  415  is selected in the state in which the page where an image with “E” written is laid out is selected, as shown in  FIG. 4 . When the “spread” checkbox  415  is selected, the image laid out on the selected page is laid out to span two pages. If the “spread” checkbox  415  is selected in the state in which an even-numbered page (the right page of a spread for right-side binding or the left page of a spread for left-side binding) of the text is selected, the selected page is displayed at the center of the spread. Then, the pages are reallocated so that the pages after the selected page are shifted backward by one page. That is, in this case, a spread is allocated to one page by adding one page after the selected page. 
     On the other hand, if an odd-numbered page of the text (the left page of a spread for right-side binding or the right page of a spread for left-side binding), like the page where “E” is written in  FIG. 4 , is selected, the next page of the selected page forms a spread different from a spread formed by the selected page. Therefore, if only one page is added after the selected page to allocate the one page to a region for two pages, the page cannot be displayed in a spread. Therefore, if, for example, the “spread” checkbox  415  is selected in the state in which the odd-numbered page of the text is selected, as shown in  FIG. 5 , one page can be added not only after but also before the selected page. This makes it possible to surely allocate the selected page to a spread. Note that in this case, the pages are reallocated so that the pages after the selected page are shifted backward by two pages. 
     When the “spread” checkbox  415  is selected in the state in which the odd-numbered page is selected, a message for notifying the user that one page is added before the selected page may be displayed. If the user approves addition of the page, processing of performing allocation to a spread may be executed. This can prevent addition of a page unintended by the user. Note that if the user does not approve addition of a page, processing of performing allocation to a spread need not be executed or a space for one page may be added after the selected page to allocate the selected page to the region for two pages. When the “spread” checkbox  415  is selected in the state in which the odd-numbered page is selected, a space for one page may be added after the selected page to allocate the selected page to the region for two pages without displaying the above-described message. Note that when such allocation is performed, a message indicating that the selected page is not printed in a spread may be displayed. 
     When the “spread” checkbox  415  is cleared after the page is allocated to a spread, the (preceding and succeeding) pages added at the time of allocation of the page to the spread are deleted, and the pages after the pages are reallocated. Note that, for example, a message indicating whether to delete pages such as blank pages added when the odd-numbered page is allocated to the spread may be displayed. 
     Note that when horizontally long original data is dragged and dropped in the edit region  401  (or allocated automatically), processing of allocating a spread automatically may be performed. In this case, the “spread” checkbox  415  is selected automatically. Furthermore, if the insertion position of this page is an odd-numbered page, a blank page or the like may be inserted (added) before the page, as described above, or predetermined error display or the like may be performed. When, after the horizontally long page is allocated to the spread, the “spread” checkbox  415  is cleared, the allocation to the spread is released and the horizontally long page can be allocated to one-side page (for example, by reduction or rotation). Note that the horizontally long page may be allocated to one-side page, similarly to a vertically long page without automatically allocating the horizontally long page to the spread. Referring back to  FIG. 4 , with respect to the selected page, an image of the spread including the page after printing is displayed as a booklet preview  411 , and thus the user can readily recognize the state of the selected page after completion of the booklet. Note that when “&lt;” or “&gt;” in the preview is selected, a preview of an adjacent spread between adjacent pages can be displayed. At this time, the selected page may move together, or only the pages of the preview may move without synchronizing the selected page and the preview with each other. 
     As described above, the user can operate the data expanded in the original data region  402  for each page by manual page allocation.  FIG. 4  shows a state in which the original data representing an image in which “C” is written is selected from the data expanded in the original data region  402 . If the thus selected original data is dragged and dropped in an arbitrary position of the edit region  401 , it is allocated to a page corresponding to the dropped position. For example, if the original data representing an image in which “C” is written is dragged and dropped in a predetermined area, in the edit region  401 , between the page where “F” is written and the page where “G” is written, the page where “C” is written is inserted between the page of “F” and the page of “G”. Note that if such page is inserted, the page numbers and the spread relationship are reconstructed accordingly. That is, the number of the page where “C” is written becomes the number of the page where “G” is written before insertion, and the numbers of the pages after the page where “G” is written are shifted backward by one. The page of “F” and the newly added page of “C” have the spread relationship, and the page of “G” has the spread relationship with the page of “H” due to addition of the page of “C”. 
     Furthermore, the user can add a blank page by pressing an “add blank page” button  412 . In this embodiment, the blank page indicates a page to which the original data selected by the user is not allocated, that is, a page where an image based on the original data selected by the user is not laid out. For example, if the “add blank page” button  412  is pressed in the state in which the page where “C” is written is selected in the edit region  401 , a blank page is added between the page where “C” is written and the page where “E” is written. A blank page may be added to the right or left side of the selected page in accordance with a predetermined rule or, if two pages are selected, may be added between the two pages. Thus, a blank page can be added to an arbitrary position in the booklet in accordance with the user&#39;s preferences, for example, a preference for setting the back surfaces of the covers blank. 
     Note that if each data in the original data region  402  is allocated to a page in the edit region  401 , information for specifying it is added at the upper left position of each data in the original data region  402 . Referring to  FIG. 4 , for example, an icon indicating allocation to the front cover is added to each of the original data representing an image in which “A” is written and the original data representing an image in which “C” is written. This allows the user to recognize that, for example, data to be allocated to a page in the booklet is not allocated, data not to be allocated to a page in the booklet is unwantedly allocated, or whether the data allocated to the cover is appropriate. The user can delete data not to be used for creation of the booklet in the original data region  402 . For example, the user can select an icon  413  displayed at the upper right position of the data in the selected state to delete the selected data from the original data region  402 . This can prevent an edit operation from becoming cumbersome due to the existence of many data not to be used in the original data region  402 . 
     Furthermore, in the original data region  402 , it is possible to select a plurality of data and collectively operate them. For example, when the original data representing an image in which “C” is written and the original data representing an image in which “D” is written are collectively selected and are collectively dragged and dropped in the edit region  401 , these data can be allocated to two successive pages. The same applies to a case in which three or more data are selected. Furthermore, if a “multi delete” button  414  is pressed in a state in which a plurality of data are selected, the plurality of data can collectively be deleted from the original data region  402 . Note that if one data is selected or no data is selected, the “multi delete” button  414  can be disabled, for example, grayed out. 
     Upon completion of editing of the booklet, as described above, the user can execute printing of each page displayed in the edit region  401  by pressing a print setting button  416 . Note that in the state in which the print setting of side stitch (1-in-1) is made, when n is an integer of 1 or more, double-sided printing is executed so that the (2n-1)th page and 2nth page have the front-back relationship. Note that double-sided printing is executed so that the front cover and its back surface have the front-back relationship and the back cover and its back surface have the front-back relationship. 
     [Case in which Saddle Stitch is Selected and Covers and Text are Created by Same Type of Sheets] 
     Subsequently, an example of the edit screen when the biding method is saddle stitch (2-in-1), and the setting of using the same type of sheets for the covers and text is made will be described with reference to  FIG. 6 . The edit screen in this case is almost the same as that shown in  FIG. 4 . However, in the case of saddle stitch, the binding positions are between the pages, and thus the marks indicating the biding positions need not be displayed, as shown in a screen example  600  of  FIG. 6 . Note that when printing on a paper surface, the marks indicating the biding positions may or may not be displayed at predetermined positions between the pages. Furthermore, for example, the mark indicating the binding positions may be printed at positions that can be seen when being output as a booklet, instead of being printed on all the sheets. 
     Note that if the binding method is saddle stitch (2-in-1), 2-in-1 double-sided printing is executed, and thus the number of pages per sheet is four. Therefore, if the number of pages added to the edit region  401  is not a multiple of 4, a page such as a blank page can be automatically added to the end so that the total number of pages is a multiple of 4. Note that a blank page is added when, for example, the edit screen is displayed, a page is added during display of the edit screen, a preview screen is displayed, or a print instruction is executed to generate print data. 
     Note that in the state in which the binding method is saddle stitch (2-in-1) and the print setting of right-side binding is made, the front surface of one sheet including the (N/2+2m+2)th page on the right side and the (N/2−2m−1)th page on the left side is printed. In the above relationship, N represents the total number of pages and m is an integer of 0 or more. Then, the back surface of the sheet including the (N/2−2m)th page on the right side and the (N/2+2m+1)th page on the left side is printed. If, for example, N=8, the front surface including the sixth page on the right side and the third page on the left side and the back surface including the fourth page on the right side (the back side of the third page) and the fifth page on the left side (the back side of the sixth page) undergo double-sided printing. Similarly, the front surface including the eighth page on the right side and the first page on the left side and the back surface including the second page on the right side (the back side of the first page) and the seventh page on the left side (the back side of the eighth page) undergo double-sided printing. The front surface on which the back cover is laid out on the right side and the front cover is laid out on the left side and the back surface on which the back surface of the front cover is laid out on the right side and the back surface of the back cover is laid out on the left side undergo double-sided printing. Note that the same applies to left-side binding except that the above relationship between the right and left sides is reversed. 
     [Case in which Side Stitch is Selected and Covers and Text are Created by Different Types of Sheets] 
     Subsequently, an example of the edit screen when the binding method is side stitch (1-in-1) and the setting of using different types of sheets for the covers and text is made will be described with reference to  FIGS. 7 and 8 . When different types of sheets are used for the covers and text, a cover edit screen  700  shown in  FIG. 7  and a text edit screen  800  shown in  FIG. 8  are used. Note that this form need not always be used but at least the screen is configured to execute printing of the covers and text independently. If the cover edit screen  700  and the text edit screen  800  are separated, buttons for switching between the edit screens, for example, a cover selection button  701  and a text selection button  702  in  FIG. 7  are displayed in the edit region  401 . When the user selects the cover selection button  701 , the cover edit screen  700  shown in  FIG. 7  is displayed. When the user selects the text selection button  702 , the text edit screen  800  shown in  FIG. 8  is displayed. Note that these buttons may be displayed outside the edit region  401 . Instead of the form of the button, for example, a tab form may be used. That is, a tab for the cover edit screen and a tab for the text edit screen may be displayed, and one of the tabs may be selected to switch the screen. 
     In the cover edit screen, only the front cover and the back cover are displayed, as shown in  FIG. 7 . Note that the front cover and the back cover are displayed in a form when viewing the booklet from the spine side. That is, for right-side binding, the front cover is displayed on the left side and the back cover is displayed on the right side. On the other hand, for left-side binding, the front cover is displayed on the right side and the back cover is displayed on the left side. If side stitch is used, binding positions are displayed. However, in the cover edit screen, the binding positions are displayed on the center side when the front cover and the back cover are laid out side by side, as shown in  FIG. 7 . In the cover edit screen  700 , the positional relationship between the front cover and the back cover is reversed, as compared with the edit screen, shown in  FIG. 4 or 6 , in which the covers and the text are collectively edited. This display allows the user to readily recognize how the booklet after printing looks like from the spine side when the booklet is opened. 
     Note that in this embodiment, if different types of sheets are used for the covers and text, the back surface of the front cover or that of the back cover is not used (that is, the back surface is blank). The present invention, however, is not limited to this. If the back surface of the front cover or that of the back cover is used, the cover edit screen displays, for example, the back surface of the front cover adjacent to the front cover and the back surface of the back cover adjacent to the back cover. In the example of  FIG. 7 , the back surface of the front cover can be displayed on the left side of the front cover and the back surface of the back cover can be displayed on the right side of the back cover. 
     As shown in  FIG. 8 , in the text edit screen, the text except for the front cover and the back cover (and their back surfaces) is displayed in the edit region. The edit screen shown in  FIG. 8  is the same as that shown in  FIG. 4  except that the front cover, the back cover, and their back surfaces are not included. 
     [Case in which Saddle Stitch is Selected and Covers and Text are Created by Different Types of Sheets] 
     The edit screen when saddle stitch is selected and the setting of using different types of sheets for the covers and text is made is the same as that shown in  FIG. 7 or 8  except that the marks of the binding positions are not displayed. Note that for saddle stitch, the number of pages needs to be a multiple of 4, as described above. However, if different types of sheets are used for the covers and text, the number of pages of the text needs to be a multiple of 4. That is, in the above-described example, adjustment is performed so that the total number of pages of the covers and text is a multiple of 4. In this example, however, adjustment is performed so that the number of pages of only the text is a multiple of 4. As a result, in this example, if the back surfaces of the covers undergo single-sided printing, the total number of pages of the covers and text is not a multiple of 4 (when a is an integer, the total number of pages is given by ( 4   a +2)). For example, if an edit operation is performed so that the text includes data for six pages, 2 blank pages or the like is inserted so that the number of pages of the text is a multiple of 4. Note that the page inserted at this time is not limited to a blank page, and may be a page including a fixed phrase, fixed figure, or fixed pattern. 
     Note that it is possible to execute borderless printing by using paper (for example, glossy paper) except for normal paper.  FIG. 9  shows an example of the edit screen in this case. Note that if the setting of using different types of sheets for the covers and text is made, the cover edit screen and the text edit screen are displayed independently. Display of one of the cover edit screen and the text edit screen can be switched by selecting the tab included in each edit screen.  FIG. 9  shows an example of the cover edit screen in the state in which borderless print setting is made. When executing borderless printing, so-called “bleed” as processing of performing control so that a print target image has a size in at least one of width and height larger than that of a sheet on which printing is executed needs to be performed. Therefore, if paper such as glossy paper that can undergo borderless printing is selected, a print region  902  of a size including bleed and an explanation  903  can be displayed. Furthermore, an option  901  used to enlarge/reduce an image based on original data in accordance with a size including bleed is displayed. This allows the user to create covers by borderless printing by only performing a simple operation. 
     Upon completion of the edit processing using the screens shown in  FIGS. 4 to 9 , the user selects a print setting button included in each of these screens. The user performs further print setting processing using a print setting screen selected by selecting the print setting button, thereby selecting print execution. This processing sends application data generated by the bookbinding application to the printer driver corresponding to the printer selected in  FIG. 3 , and the printer driver generates print data based on the application data. Note that if the covers and text are printed on the same type of sheets, the application data includes pages laid out in the covers and pages laid out in the text. That is, the pages laid out in the covers and the pages laid out in the text are printed using the print data based on the application data. On the other hand, if the covers and text are printed on the different types of sheets, the pages laid out in the covers and the pages laid out in the text are printed independently. Therefore, the above-described print setting screen prepares an option for selecting the covers or the text as a print target. In this case, if the user instructs printing in the state in which the covers are selected, the application data includes only pages laid out in the covers, and the printer driver generates print data for the covers. On the other hand, if the user instructs printing in the state in which the text is selected, the application data includes only pages laid out in the text, and the printer driver generates print data for the text. 
     First Embodiment 
     [Layout in Booklet Printing] 
       FIGS. 10A and 10B  are views for explaining the layout of pages in booklet printing according to this embodiment. A booklet formed from eight pages including a front cover and a back cover will be exemplified.  FIG. 10A  shows image data sorted in a page order from the front cover (first page) to the back cover (eighth page). Referring to  FIGS. 10A and 10B , each of pairs of the second and third pages, the fourth and fifth pages, and the sixth and seventh pages has a spread relationship. 
       FIG. 10B  shows the layout to be printed on sheets when printing the image data shown in  FIG. 10A  with the saddle stitch setting. In this example, double-sided printing is executed with the 2-in-1 layout. The center of each sheet corresponds to the folding position of the sheet, and stapling is performed around the center. The image of the eighth page (back cover) and that of the first page (front cover) are laid out on the front surface of the first sheet. The image of the second page and that of the seventh page are laid out on the back surface of the first sheet. The image of the sixth page and that of the third page are laid out on the front surface of the second sheet. The image of the fourth page and that of the fifth page are laid out on the back surface of the second sheet. This layout makes it possible to create a left-side stitch, leftward booklet. 
     [Occurrence of Blank Page in Booklet Printing] 
       FIG. 11  is a view for explaining the occurrence of a blank page in booklet printing described with reference to  FIGS. 10A and 10B . An example of executing booklet printing using five images will now be described. 
     In printing with the 2-in-1 setting, images for four pages are printed on one sheet. That is, when the five images are laid out, as shown in  FIGS. 10A  and  10 B, the images for five pages are laid out in regions where images for eight pages can be laid out, respectively, and thus regions for three blank pages are generated. That is, the necessary number of images and the layout positions of the images for a plurality of sheets forming a booklet change in accordance with the number of images to be allocated to one sheet (N-in-1 setting), the shape of the booklet as a printing product, and the like. Therefore, if the number of pages on which the images are laid out does not reach the number of pages necessary to form the booklet, a blank page unintended by the user unwantedly occurs. 
     A practical example in which a blank page unintended by the user occurs will be described. In printing with the N-in-1 setting, the number of pages necessary to form a booklet is given by N×2. If a number M of images laid out on the pages by the user is less than N×2, blank pages the number of which is given by N×2−M are automatically inserted. Note that in printing with the N-in-1 setting where N is 2 or more or the saddle stitch setting, the possibility that a blank page is inserted automatically is higher. However, in printing with 1-in-1 setting or the side stitch setting as well, a blank page can be inserted automatically. 
     However, it takes time for the user to confirm every time whether a blank page has occurred due to a small number of pages on which images are laid out. 
     On the other hand, there is also a blank page inserted intentionally by the user. As described above, the user can insert a blank page intentionally by pressing a button  412  in an edit screen  400  shown in  FIG. 4  to execute a blank page addition instruction. In this case, it is necessary to identifiably present whether the blank page is inserted intentionally by the user or inserted automatically by the system based on the print setting and the like. 
     In consideration of the above point, this embodiment will describe an arrangement for notifying the user that the blank page is inserted automatically. 
     [Processing Procedure] 
     Processing according to this embodiment will be described with reference to  FIG. 12 . A processing procedure shown in  FIG. 12  is implemented when a CPU  103  of an information processing apparatus  101  on which a bookbinding application  201  operates reads out a program corresponding to the bookbinding application  201  from an external storage device  106  or the like and executes it. This processing may be executed when performing a print instruction in a print screen or when displaying a print preview screen. Alternatively, this processing may be executed with reference to an editing result every time the user performs some editing in the edit screen. 
     In step S 1201 , the CPU  103  obtains information concerning pages included in an edit region. The information obtained at this time includes, for example, information concerning whether pages included in the edit region include a blank page, and information concerning whether a blank page included in the edit region is a page inserted by the user. 
     In step S 1202 , based on the information obtained in step S 1201 , the CPU  103  determines whether the pages included in the edit region include a blank page. If the CPU  103  determines that the pages included in the edit region include a blank page (YES in step S 1202 ), the process advances to step S 1203 ; otherwise (NO in step S 1203 ), the process ends without executing notification processing (to be described later). 
     In step S 1203 , based on the information obtained in step S 1201 , the CPU  103  determines whether all the blank pages included in the edit region are pages inserted by the user. A blank page inserted by the user indicates a page inserted based on reception of a blank page insertion instruction from the user, more specifically, a page added when the user presses the “add blank page” button  412 . On the other hand, a blank page not inserted by the user (an automatically inserted blank page) indicates a page inserted automatically (without any user instruction to insert a blank page) by the bookbinding application  201 , as will be described later. If the CPU  103  determines that all the blank pages included in the edit region are pages inserted by the user (YES in step S 1203 ), the process ends without executing the notification processing (to be described later). On the other hand, if any of the blank pages included in the edit region is not a page inserted by the user (NO in step S 1203 ), the process advances to step S 1204 . 
     In step S 1204 , the CPU  103  executes the notification processing of notifying the user of information concerning the blank page. This processing will be described in detail later. Then, the processing procedure ends. 
     [Notification] 
     A notification screen (notification region) according to this embodiment, which is displayed in the notification processing executed in step S 1204 , will be described. 
       FIG. 13  shows an example of a screen displayed when the processing shown in  FIG. 12  is performed by displaying a print setting screen  1301  and pressing a print button  1302  by the user. When the print button  1302  is pressed and the processing in step S 1204  of  FIG. 12  is performed, a notification screen  1303  is displayed. That is, the notification processing can be executed in response to execution of a print instruction by the user. A message indicating that there is a blank page is displayed on the notification screen  1303 . Contents of the message are merely an example, and may include, for example, information concerning the number and positions (page numbers) of pages corresponding to blank pages. When the user presses an OK button  1304 , print processing is executed with the current settings. When the user presses a cancel button  1305 , the control returns to the print setting screen  1301 . At this time, the screen may transition to the edit screen or the preview screen to display information concerning the blank pages. 
       FIG. 14  shows another example of a notification according to this embodiment.  FIG. 14  shows an example of a notification when the processing shown in  FIG. 12  is performed at the time of displaying a print preview screen  1400 . That is, the notification processing can be executed when the user performs a display instruction of the print preview screen. The print preview screen  1400  includes a display region  1401  where images are displayed in a page order and a display region  1402  where the layout of the images on printed materials is displayed.  FIG. 14  shows an example of a booklet formed from eight pages including the covers (front cover and back cover) based on the print settings. 
     In the display region  1401 , regions for eight pages are displayed in a page order. In this example, pages on which five images are laid out and one designated blank page are displayed. The “designated blank page” indicates a blank page designated by the user to be inserted. A page  1403  is displayed as a designated blank page. Furthermore, two blank pages  1404  are displayed. The blank pages  1404  are highlighted by frames. Note that the display methods of the designated blank page and the blank pages are not limited to them, and other display methods may be used. 
     In the display region  1402 , the print layout for printed materials including regions for eight pages is displayed. A page  1405  is a designated blank page and corresponds to the page  1403 . Blank pages  1406  correspond to the blank pages  1404 . The blank pages  1406  are also highlighted by frames. Note that the display method of the blank pages may be different between the display regions  1401  and  1402 . A message  1407  is used to make a notification of information concerning the blank pages. Note that the display methods of the message  1407  and the blank pages may be switched by user settings. 
     Note that the timing of performing the notification processing is not limited to that in the above-described form. For example, the notification processing may be performed in the edit screen by executing the processing shown in  FIG. 12  with reference to an editing result every time the user performs some editing in the edit screen. In the edit screen, the automatically inserted blank pages may be highlighted to be discriminated from the remaining pages. 
     As described above, according to this embodiment, by making a notification of the existence of a blank page, it is possible to prevent output of printed materials including a blank page unintended by the user. In addition, the user can readily recognize that an unintended blank page is laid out. 
     Note that even in a situation other than the above-described situation, a blank page may be inserted automatically. The situation will be described in detail below. 
       FIGS. 15A to 15C  are views for explaining other print layouts to which the present invention is applicable. As the arrangement of a booklet, the booklet may be created from one sheet.  FIG. 15A  shows an example of creating a booklet by laying out eight images and executing printing with the 8-in-1 print setting and cutting a portion of a line  1501  to fold the sheet. 
       FIG. 15B  shows a case in which when assuming a printed material shown in  FIG. 15A , an image indicated by “ 4 ” is set with a spread setting to span two regions (a region  1511 ). In this case, in response to an image layout instruction, an image indicated by “ 8 ” is pushed out to the back surface of the sheet and laid out in a region  1512 . In this case, portions corresponding to seven regions on the back surface are automatically inserted as blank pages. A notification may be made for each of the blank pages. 
       FIG. 15C  shows a case in which when assuming the printed material shown in  FIG. 15A , a spread setting is made so that the image indicated by “ 8 ” spans the entire sheet. In this case, the image indicated by “ 8 ” is laid out on the entire back surface of the sheet (a region  1522 ). In this case, a region  1521  where the image indicated by “ 8 ” was laid out is automatically inserted as a blank page. With respect to the region  1521 , a notification that the region  1521  is a blank page may be made. 
       FIG. 16A  shows an example in which seven images are laid out in regions in which eight images can be laid out, respectively. An image indicated by “ 5 ” is set with a spread setting and is laid out to span regions for two pages. 
       FIG. 16B  assumes that image A is inserted between the page in which the image indicated by “ 2 ” is laid out and the page in which the image indicated by “ 3 ” is laid out. In this case, the images after “ 3 ” are shifted to the subsequent pages. However, the image indicated by “ 5 ” is displayed in a double-page spread, and thus cannot be shifted by one page to be laid out. This is because the page and its subsequent page in which the image indicated by “ 5 ” is laid out by shifting by one page have no spread relationship, and thus the image cannot be displayed in a spread. As shown in  FIG. 16C , the spread of the image indicated by “ 5 ” is maintained by automatically inserting a blank page at a position next to a position where image A is laid out. In this case, the automatically inserted blank page may be recognized, and a notification of it may be made. 
     Second Embodiment 
     In the first embodiment, the information concerning the blank pages is displayed on the preview screen, as shown in  FIG. 14 . In the second embodiment, a different display method in the preview screen will be described. Note that a description of the arrangement which overlaps the first embodiment will be omitted. 
     [Notification] 
       FIGS. 17A to 17C  are views each for explaining the notification method of a blank page in the preview screen according to this embodiment. Referring to  FIGS. 17A and 17C , only a display region  1401  shown in  FIG. 14  is extracted and shown. In this embodiment, a method of displaying on the preview screen is switched in accordance with the print settings. 
       FIG. 17A  shows a display example when “2-in-1”, “double-sided printing”, “booklet printing”, and “left-side stitch” are set as print settings. In  FIG. 17A , the left side is set as the beginning of the pages, and a state in which blank pages  1701  for three pages exist in the latter half (right side) is displayed. 
       FIG. 17B  shows a display example when “2-in-1”, “double-sided printing”, “booklet printing”, and “right-side stitch” are set as print settings. In  FIG. 17B , the right side is set as the beginning of the pages, and a state in which blank pages  1702  for three pages exist in the latter half (left side) is displayed. 
       FIG. 17C  shows a display example when “1-in-1”, “double-sided printing”, “booklet printing”, and “left-side stitch” are set as print settings. In  FIG. 17C , the left side is set as the beginning of the pages, and a state in which the last page (the back side of the third sheet) is a blank page is displayed. 
     The above-described print settings can be obtained in step S 1201  of  FIG. 12 , and display is switched based on the print settings. Furthermore, since, as described above, regions where an image can be laid out are specified based on the print settings, a region (blank page) where no image is laid out is decided. Note that the remaining processes are the same as those shown in  FIG. 12  described in the first embodiment. 
     As described above, according to this embodiment, it is possible to prevent output of printed materials including a blank page unintended by the user. Furthermore, the user can readily recognize, by the notification method changed in accordance with the print setting, that an unintended blank page is laid out. 
     Third Embodiment 
     In the second embodiment, the display method of the blank page is switched in accordance with the print settings in the preview screen. This embodiment will further describe different display methods in a preview screen based on the presence/absence of a cover setting. Note that a description of the arrangement which overlaps the second embodiment will be omitted. 
     [Notification] 
       FIGS. 18A and 18B  are views each for explaining the notification method of a blank page in the preview screen according to this embodiment. Referring to  FIGS. 18A and 18B , only a display region  1401  shown in  FIG. 14  is extracted and shown. In this embodiment, whether to provide the covers of a booklet is settable as a cover setting included in print settings. For example, if the cover setting is made, a setting of using a different sheet and the like can be made individually for the covers. Thus, if the setting of using the covers is made, display different from that in the second embodiment is performed. 
       FIG. 18A  shows a display example when “2-in-1”, “double-sided printing”, “booklet printing”, “left-side stitch”, and “absence of covers” are set as print settings. In  FIG. 18A , the left side is set as the beginning of the pages, and a state in which blank pages  1801  for three pages exist in the latter half (right side) is displayed. 
       FIG. 18B  shows a display example when “2-in-1”, “double-sided printing”, “booklet printing”, “left-side stitch”, and “presence of covers” are set as print settings. In  FIG. 18B , the left side is set as the beginning of the pages, and a front cover  1802  and a back cover  1804  are provided. Furthermore, a state in which blank pages  1803  for three pages exist before the back cover  1804  is displayed. 
     The above-described print settings can be obtained in step S 1201  of  FIG. 12 , and display is switched based on the print settings. Furthermore, since, as described above, a region where an image can be laid out is specified based on the print settings, a region (blank page) where no image is laid out is decided. Note that the remaining processes are the same as those shown in  FIG. 12  described in the first embodiment. 
     As described above, according to this embodiment, it is possible to prevent output of printed materials including a blank page unintended by the user. Furthermore, the user can readily recognize, by the notification method changed in accordance with the presence/absence of the covers, that an unintended blank page is laid out. 
     Other Embodiments 
     Embodiment(s) of the present invention can also be realized by a computer of a system or apparatus that reads out and executes computer executable instructions (e.g., one or more programs) recorded on a storage medium (which may also be referred to more fully as anon-transitory computer-readable storage medium&#39;) to perform the functions of one or more of the above-described embodiment(s) and/or that includes one or more circuits (e.g., application specific integrated circuit (ASIC)) for performing the functions of one or more of the above-described embodiment(s), and by a method performed by the computer of the system or apparatus by, for example, reading out and executing the computer executable instructions from the storage medium to perform the functions of one or more of the above-described embodiment(s) and/or controlling the one or more circuits to perform the functions of one or more of the above-described embodiment(s). The computer may comprise one or more processors (e.g., central processing unit (CPU), micro processing unit (MPU)) and may include a network of separate computers or separate processors to read out and execute the computer executable instructions. The computer executable instructions may be provided to the computer, for example, from a network or the storage medium. The storage medium may include, for example, one or more of a hard disk, a random-access memory (RAM), a read only memory (ROM), a storage of distributed computing systems, an optical disk (such as a compact disc (CD), digital versatile disc (DVD), or Blu-ray Disc (BD)™), a flash memory device, a memory card, and the like. 
     While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions. 
     This application claims the benefit of Japanese Patent Application No. 2018-129465, filed Jul. 6, 2018, which is hereby incorporated by reference herein in its entirety.