Patent ID: 8045190

Claim:
An image forming apparatus comprising: a sheet insertion designation unit configured to designate execution of a sheet insertion processing to insert an insertion sheet into a printed document based on a plurality of pages of original documents a scanner unit configured to read a part of the plurality of pages of original document; an image data storage unit configured to store a first image data by reading the part of the plurality of pages by the scanner unit; a display unit configured to request a user to identify a tray among a plurality of trays, the tray having the insertion sheet, after reading the part of the plurality of pages; and the display unit to request the user to start to read the other part of the plurality of pages of original document after identifying the tray with the selection by the user; the scanner unit configured to read the other part of the plurality of original document upon the reading request by the user; the image data storage unit configured to store a second image data by reading the other part of the plurality of pages by the scanner unit; and a print unit configured to print out the first and second image data stored in the image data storage unit, together with inserting the insertion sheet from the tray identified by the user between a first document printed based on the first image data and a second document printed based on the second image data.