Impress Guide 7.4

Chapter 4,
Adding and Formatting
ImagesCopyrightThis document is Copyright © 2022 by the LibreOffice Documentation Team. Contributors arelisted below. This document maybe distributed and/or modified under the terms of either the GNU
General Public License (https://www.gnu.org/licenses/gpl.html), version 3 or later, or the Creative
Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), version 4.0 or later.
All trademarks within this guide belong to their legitimate owners.

Contributors
Contributors for this edition:Peter Schofield
Kees Kriek
Contributors for previous editions:Peter Schofield
Samantha Hamilton
Kees Kriek
Michele Zarri

Jean Hollis Weber
T. Elliot Turner

Vasudev Narayanan
Rachel Kartch

Feedback
Please direct any comments or suggestions about this document to the Documentation Team
mailing list: loguides@community.documentfoundation.org.

Note
Everything sent to a mailing list, including email addresses and any otherpersonal information that is written in the message, is publicly archived andcannot be deleted.

Publication date and software version
Published October 2022. Based on LibreOffice 7.4 Community.
Other versions of LibreOffice may differ in appearance and functionality.

Using LibreOffice on macOS
Some keystrokes and menu items are different on macOS from those used in Windows andLinux. The table below gives some common substitutions used in this document. For a detailed
list, see LibreOffice Help.
Windows or Linux macOS equivalent

EffectTools > Options
menu selection

LibreOffice > Preferences

Access setup options

Right-click

Control+click, Ctrl+click, orright-click depending on computer Open a context menu
setup

Ctrl or Control⌘ and/or Cmd or Command,
depending on keyboard

Used with other keys

Alt

⌥ and/or Alt or Option
depending on keyboard

Used with other keys

F11

⌘+T

Open the Styles deck in the
SidebarDocumentation for LibreOffice is available at https://documentation.libreoffice.org/en/Contents
Copyright..........................................................................................................................2
Contributors................................................................................................................................2
Feedback....................................................................................................................................2
Publication date and software version........................................................................................2
Using LibreOffice on macOS......................................................................................................2

Introduction......................................................................................................................4
Inserting images.............................................................................................................. 4
Image files..................................................................................................................................4
Inserting image files...............................................................................................................4
Linking image files.................................................................................................................5
Inserting scanned images...........................................................................................................5
Inserting Gallery images.............................................................................................................5

Gallery themes................................................................................................................. 6
Default themes............................................................................................................................6
Custom themes...........................................................................................................................6
Creating themes....................................................................................................................7
Adding theme images............................................................................................................8
Deleting theme images..........................................................................................................8
Updating themes....................................................................................................................8

Formatting images...........................................................................................................8
Moving images............................................................................................................................8
Resizing images.........................................................................................................................9
Rotating, slanting or skewing images.........................................................................................9
Using Image Filters...................................................................................................................11
Image Filter toolbar..............................................................................................................11
Image filters..........................................................................................................................11
Changing image mode..............................................................................................................12
Color adjustment.......................................................................................................................14
Replacing colors and transparent areas...................................................................................14
Replacing colors..................................................................................................................15
Replacing transparent areas................................................................................................16
Tolerance parameter............................................................................................................16
Image transparency..................................................................................................................16
Adjusting shadow settings........................................................................................................17
Cropping images.......................................................................................................................18
Quick cropping.....................................................................................................................18
Dialog cropping....................................................................................................................18
Cropping options..................................................................................................................19
Deleting images........................................................................................................................20

Creating image maps.....................................................................................................21

Chapter 4, Adding and Formatting Images | 3

Introduction
Images are often used in presentations as they can convey a large amount of information more
quickly than the written word. Images, such as a company logo for example, can give a
presentation a more professional look. Also, an Impress presentation can consist of only images,
such as a slideshow of holiday snapshots to share with friends.

Inserting images
This section describes several ways to insert an image from an external source into thepresentation. Once the image has been inserted, it can be formatted extensively.

Image files
Inserting image files
Inserting an image from a file is easy and can be formatted after it has been placed on the slide.
1) Insert a new slide into the presentation or select a slide in the presentation. See
Chapter 1, Introducing Impress for more information.
2) Select a layout for the slide. See Chapter 1, Introducing Impress for more information.
3) Go to Insert > Image on the Menu bar and the Insert Image file browser opens(Figure 1).
4) Navigate to the directory containing the required image and select the file. LibreOffice iscompatible with a large number of image formats.
5) If necessary, select Preview and a thumbnail of the selected file is displayed in thepreview pane on the right of the file browser.
6) Click on Open to place the image in the centre of the selected slide and close the filebrowser window. The image is displayed with selection handles around the image border.
7) Format the image to the presentation requirements. See “Formatting images” on page 8
for more information.

Figure 1: Example of Insert Image file browser

4 | Chapter 4, Adding and Formatting Images

Linking image files
To insert a linked image, select Insert as Link in the Insert Image file browser. The selected
image file is then inserted as a link to a file rather than embedding the image file into apresentation. However, it is preferable to embed images so that a presentation can be copied
and used on other computers. Sometimes, it makes sense to link an image file rather thanembed it and the reasons for linking could be as follows:• When an image file is large, linking rather than embedding dramatically reduces the filesize of the presentation.
• When the same image file is used in many presentations. For example, when using thesame background image for all the presentations created.
• When the linked file is only available when the presentation is opened. For example, if
the presentation is a slide show of holiday photographs.

Inserting scanned images
Inserting an image from a scanner is normally a simple process if the following points are valid
for the computer being used:• Scanner software driver has been installed on the computer.
• Scanner is supported by the SANE system and the computer operating system is Linuxor other UNIX operating system.
• Scanner is TWAIN compatible and the computer is operating Windows or macOS.
• Scanner is configured on a computer with LibreOffice software installed.
The following scanning procedure is only an example to demonstrate how to insert an image
from a scanner. The actual procedure used depends on computer operating system, the type ofscanner being used, and the scanner driver software installed.
1) Prepare the image for the scanner and make sure that the scanner is switched on.
2) If the scanner and scanning software has not been used before, go to Insert > Media >Scan > Select Source on the Menu bar to open a scanner dialog.
3) If the scanner and scanning software is already installed on the computer, then go toInsert > Media > Scan > Request on the Menu bar to open a scanner dialog.
4) If there is more than one scanner connected to a computer, select the scanner from theSelect Source or Device Used drop-down list.
5) If available, click Create Preview or Preview to create a preview scan of the image andplace it in the preview area.
6) If necessary, crop the scanned image to what is required and make any necessary
scanning adjustments.
7) Click Scan and the image is scanned. Impress then places the scanned image in thecentre of the selected slide.
8) Format the image to the presentation requirements. See “Formatting images” on page 8
for more information.

Inserting Gallery images
The Gallery deck on the Sidebar contains a collection of images that can be used in apresentation. Images can also be added to the Gallery, making it an essential tool for creatingpresentations quickly. The Gallery is available for all LibreOffice components. For more
information on the Gallery, see the Getting Started Guide.
Inserting images | 5

Figure 2: Gallery deck on Sidebar
1) Open the Gallery deck in the Sidebar (Figure 2) using one of the following methods:– Go to Insert > Media > Gallery on the Menu bar.
– Click on Gallery in the Sidebar.
2) Select a theme from the available themes and the images for that theme are displayed.
3) Scroll through the available images and select the required image.
4) Click and hold on the image and drag it onto the slide. Release the hold and the image isinserted centrally into the slide.
5) Format the image to the presentation requirements. See “Formatting images” on page 8
for more information.

Gallery themes
Default themes
Images in the Gallery are grouped by themes, such as Arrows, Bullets, Diagrams and so on, andthese default themes are listed alphabetically in the box at the top of the Gallery deck on the
Sidebar (Figure 2). Click on a theme to see its images displayed in the Gallery deck.
The Gallery default themes are read-only. No images or graphics can be added to or deleted
from these themes. The default themes are easily identified by right-clicking on a theme nameand the only available option in the context menu is Properties.

Custom themes
When custom themes have been created, they are the only themes where images can be added.
Custom themes are listed alphabetically, along with the default themes, in the box at the top of
the Gallery deck on the Sidebar. Custom themes are easily identified by right-clicking on a themename and the options available in the context menu are Delete, Rename, and Properties.

6 | Chapter 4, Adding and Formatting Images

Creating themes
1) Open the Gallery deck in the Sidebar using one of the following methods:– Go to Insert > Media > Gallery on the Menu bar.
– Click on Gallery in the Sidebar.
2) Click New at the bottom of the Gallery deck and the Properties of New Theme dialog
opens (Figure 3).
3) Click on General and type a name for the new theme in the text box.
4) Click OK to save the new theme and close the dialog. The new theme is displayed in thelist of themes in the Gallery.

Note
The name of the Properties of New Theme dialog changes to show the name of
the newly created custom theme in the Gallery deck.

Figure 3: Properties of New Theme dialog - General page

Figure 4: Properties of New Theme dialog - Files page

Gallery themes | 7

Adding theme images
1) Right-click on a custom theme name in the theme list on the Gallery deck and selectProperties from the context menu to open the Properties of New Theme dialog.
2) Click on Files to open the Files page (Figure 4), then click on Find Files to open a SelectPath dialog.
3) Navigate to the folder that contains the images required and select the folder.
4) Click OK to close the Select Path dialog. The files contained in the folder appear in theProperties of New Theme dialog.
5) If necessary, select Preview and any image selected appears in the preview box.
6) Select the files required for the custom theme and click on Add. The added files
disappear from the file list and the images appear in the custom theme on the Gallery
deck.
7) To add all the files in the list, then click Add All. All the files disappear from the list and theimages appear in the custom them on the Gallery deck.
8) Click OK and close the Properties of New Theme dialog.

Deleting theme images
Only images added to a custom themes can be deleted.
1) Open the Gallery deck and select a custom theme.
2) Right-click on the image being deleted and select Delete from the context menu.
3) Click Yes in the confirmation message to delete the image.

Note
Images in custom themes are linked files and are deleted from the Gallery only.
The original image files are not deleted.

Updating themes
All images in the Gallery are linked files. It is recommended that any custom themes are updated
on a regular basis to make sure that all the files are still available.
1) Open the Gallery deck and select a new theme that has been created.
2) Right-click on the name of a custom theme that contains at least one image.
3) Select Update from the context menu and the links to all the image files are updated

Formatting images
For more information on moving, resizing, rotating, slanting or skewing images and objects, see
Chapter 6, Formatting Graphic Objects.

Moving images
1) Click on an image to select it and display the selection handles.
2) Move the cursor over the image until it changes shape. The cursor shape depends on thecomputer operating system, for example a clenched hand.
3) Click and drag the picture to the desired position, then release the cursor when the image
is in the desired position.

8 | Chapter 4, Adding and Formatting Images

Resizing images
1) Click on an image to select it and display the selection handles.
2) Position the cursor over one of the selection handles. The cursor changes shape giving agraphical representation of the direction of the resizing.
3) Click and drag the selection handle to resize the image, then release the cursor when theimage is at the required size.

Notes
The corner selection handles resize both the width and the height of the graphic
object simultaneously. The top and bottom selection handles resize the image
height. The left and right selection handles resize the image width.
To retain the original proportions of the graphic, hold down the Shift key, thenclick on a selection handle and drag the selection handle. Make sure to release
the cursor before releasing the Shift key.

Tip
Re-sizing a bitmapped (raster) image affects the image resolution causing somedegree of blurring. It is recommended to use a specialized graphics program tocorrectly scale the picture to the desired size before inserting it into apresentation. LibreOffice recommends Gimp (https://www.gimp.org).

Rotating, slanting or skewing images
1) Click on an image to select it and display the selection handles.
2) Select rotation mode (Figure 5) using one of the following methods. The color and shapeof the selection handles changes depending on the computer operating system andsetup.
– Click on Rotate on the Drawing toolbar (Figure 6).
– Click again on a selection handle.
3) The central selection handle is the normal rotation point for the selected image. If
required, click, hold and drag this rotation point to another position (even outside of theimage) to change how the selected image is rotated.
4) Click and drag a selection handle to rotate, slant or skew the image as follows. A ghost
image appears while dragging the cursor.
– Corner selection handles rotate the image.
– Left and right selection handles slant the image.
– Top and bottom selection handles skew the image.
5) Release the cursor when the required rotation, slanting or skewing is reached.

Note
To restrict the rotation angles to multiples of 15 degrees, click on a selection
handle, hold down the Shift key and drag to rotate, slant or skew. Make sure torelease the cursor before releasing the Shift key.

Formatting images | 9

Figure 5: Example of rotating, slanting, and skewing images
Legend for Figure 5
1) Rotating mode
2) Rotating image

3)
4)

Slanting image
Skewing image

Figure 6: Drawing toolbar

Figure 7: Image toolbar

Figure 8: Image Filter toolbar

10 | Chapter 4, Adding and Formatting Images

Using Image Filters
Image Filter toolbar
When an image is selected, the Image toolbar (Figure 7) and the Image Filter toolbar (Figure 8)
become available to format an image.
1) Select an image on a slide.
2) Go to View > Toolbars > Image on the Menu bar to open the Image toolbar. The Image
toolbar only opens when an image is selected.
3) Click on Filter to open the Image Filter toolbar. The Image Filter toolbar only opens when
an image is selected.
4) Select the required filter and it is applied immediately to the image.
5) Alternatively, go to Format > Image > Filter on the Menu bar and select a filter from thesubmenu. This applies the image filter at the filter default settings.
6) Click outside the image to deselect it and save the presentation.

Image filters
The effect each image filter has on an image is described below. The best way to judge if a filter
works is to try it. See the Draw Guide for more information on image filters and examples of thefilter effects.
InvertInverts or reverses the color values of a color image (similar to a color negative), or thebrightness values of a grayscale image. Apply the filter again to revert to the originalgraphic.
SmoothSoftens or blurs the image by applying a low pass filter reducing the contrast between
neighboring pixels and produces a slight lack of sharpness. Selecting this filter opens the
Smooth dialog to set and use the smooth radius parameter.
SharpenSharpens the image by applying a high pass filter, increasing the contrast between
neighboring pixels emphasizing the difference in brightness. This accentuates the outlines
and the effect is strengthened if the filter is applied several times.
Remove Noise
Removes noise by applying a median filter comparing every pixel with its neighborcreating an image that looks smoother. It replaces any pixel with extreme values thatdeviate in color by a large amount from the mean value with a pixel that has a mean color
value. The amount of image information does not increase because there are fewer
contrast changes.
Solarization
Solarization is a phenomenon in photography where an image recorded on a negative oron a photographic print is wholly or partially reversed in tone. Dark areas appear light orlight areas appear dark. Solarization was originally a photochemical effect used during
photographic film development and is now used in the digital world of computing to createa change or reversal of color. Selecting this image filter opens the Solarization dialog,
where the Threshold value for solarization can be defined. Entering a threshold value
above 70% reverses the color values. Selecting the Invert option causes all the colors to
be inverted.

Formatting images | 11

AgingAging creates a look that resembles photographs developed in the early days ofphotography. All pixels are set to their gray values. The green and blue color channels are
reduced by the amount specified in Aging degree in the Aging dialog. Red color channel
is not changed. Selecting this image filter opens the Aging dialog, where the Aging degree
can be defined creating an old look to an image.
Posterize
Posterizing reduces the number of colors in an image making it look flatter. When used ona photograph, posterizing can make the photograph look like a painting. Selecting thisimage filter opens the Posterize dialog, where the number of poster colors can be defined
to produce the required effect.
Pop ArtSelect this image filter to change the colors of an image to a pop-art format.
Charcoal Sketch
Selecting this image filter displays an image as a charcoal sketch. The contours of theimage are drawn in black and the original colors are suppressed.
ReliefThis image filter calculates the edges of an image in relief as if the image is illuminated bya light source. Selecting this image filter opens the Emboss dialog where the position of
the Light source can be selected producing shadows that differ in direction andmagnitude.
MosaicThis image filter joins groups of pixels and converts them into a rectangular tile in a single
color creating an image that appears to be a mosaic. The larger the individual rectangles
created, the fewer details the mosaic graphic has. Selecting this image filter opens theMosaic dialog, where the number of pixels used can be set to create the Width andHeight of each tile created. Selecting Enhanced edges enhances the edges of each tile tocreate a sharper definition.

Changing image mode
The Image Mode drop-down list on the Image toolbar provides options to change the color orimage mode of a selected image. The options for image mode are as follows and an example ofusing Image Mode is shown in Figure 9.
Default
Image color is not changed.
Grayscale
The image is shown in grayscale. A color image becomes monochrome in grayscale.
Color sliders can be used to apply a uniform color to the monochrome graphic object.
Black and White
The image is shown in black and white. All brightness values below 50% appear black, allbrightness values over 50% appear white.
WatermarkIn an image, the brightness is raised and the contrast reduced to allow the image to be
used in the background as a watermark.

12 | Chapter 4, Adding and Formatting Images

Figure 9: Example of image modes
Legend for Figure 91) Original2) Greyscale

3)4)Black/White
WatermarkFigure 10: Example of adjusting color levels
Formatting images | 13

Legend for Figure 10
1) Original2) 25% Red3) 25% Green

4)
5)
6)

25% Blue
25% Brightness
50% Contrast

7)

Gamma Level 5

Figure 11: Color toolbar

Color adjustment
The Color toolbar is used to adjust individual colors within the whole of the image (red, green,blue), as well as the brightness, contrast, and gamma of the image. Increasing the gamma valueof an image makes it more suitable to be used as a background or watermark as the image hasless interference with a dark text. An example of changing the percentage and levels for color,brightness, contrast, and gamma of an image is shown in Figure 10.
After selecting an image, open the Color toolbar (Figure 11) using one of the following methods
to change the values for color adjustment:• Click on Color in the Image toolbar.
• Go to Format > Image > Color on the Menu bar.

Replacing colors and transparent areas
The Color Replacer dialog (Figure 12) only allows a color to be replaced or changed inembedded images for another color or a color set as transparent. The embedded image must bea bitmap (for example BMP, GIF, JPG, or PNG), or a metafile (for example WMF). Up to fourcolors can be replaced at once. Color Replacer only works on the same color in the entire image.
Individual areas in an image cannot be selected for color replacement.
The colors available in the Replace with drop-down lists are all contained in color palettes thatare part of the installation of LibreOffice. If any custom colors have been created, then thesecolors are available in the custom palette. For more information on creating custom colors, see
the Draw Guide.

Note
The Color Replacer can only be used on embedded images. If the Color Replacer
is used on a linked image, the following error message appears This image islinked to a document. Do you want to unlink the image in order to edit it?.

14 | Chapter 4, Adding and Formatting Images

Figure 12: Color Replacer dialog

Figure 13: Example of replacing colors

Replacing colors
1) Select an embedded image to start using the Color Replacer.
2) Go to Tools > Color Replacer on the Menu bar to open the Color Replacer dialog.
3) Click on Pipette at the top of the Color Replacer dialog to activate the color selectionmode.
4) Move the cursor over the color being replaced in the selected image and click on thecolor. A check box is now marked and the selected color appears in Source color.
5) If necessary, select another three colors in the selected image. A maximum of four colors
can be selected.
6) Enter the amount of tolerance required for replacing the color in the Tolerance box. The
default selection is 10% tolerance.
7) Select a color from the color palettes available in the Replace with drop-down list for eachcolor selected. Transparent is the default selection.
8) After selecting up to four colors for replacement, click Replace to replace the colors in theselected image. An example of replacing colors is shown in Figure 13.

Formatting images | 15

9) There is no preview of the effect. If the result is not what is required, select Edit > Undo
in the Menu bar and repeat the color replacement.

Notes
If the Replace button does not become active when replacing colors, then the fileformat of the image is not compatible with LibreOffice Impress.
Using Color Replacer replaces all occurrences of the Source color in theselected image.
The default selection of Transparent in Replace with removes the selected color
from the image and creates transparent areas in the image.

Replacing transparent areas
1) Select an embedded image to start using the Color Replacer.
2) Go to Tools > Color Replacer on the Menu bar to open the Color Replacer dialog.
3) Select Transparency in the Color Replacer dialog.
4) Select a color from the available color palettes in the drop-down list next to Transparency.
5) Click Replace to replace the transparent areas with the selected color.
6) There is no preview of the effect. If the result is not what is required, select Edit > Undo
in the Menu bar and repeat the transparency replacement.

Tolerance parameter
The Tolerance parameter is used to set how much of the source color in an embedded image isreplaced by another color.
• Replacing colors that are similar to the color being replaced, enter a low value for thetolerance parameter.
• Replacing a wider range of colors, enter a higher value for the tolerance parameter.

Image transparency
Specifies the transparency in an image. A percentage value of 0% is a fully opaque image and apercentage value of 100% is a fully transparent image. As with the gamma value of an image,increasing the transparency makes the image blend more smoothly into the background making
any overlay text easier to read.

Figure 14: Example of changing image transparency
16 | Chapter 4, Adding and Formatting Images

Figure 15: Area dialog - Shadow page
Click on Transparency on the Image toolbar and change the percentage value in the text box toadjust the image transparency. An example of adjusting the transparency percentage is shown in
Figure 14.

Adjusting shadow settings
Select an image, then click on Shadow on the Image toolbar to apply a shadow to the image.
The shadow applied uses the settings from the Shadow page of the Area dialog (Figure 15). If ashadow is already applied to the image, clicking on Shadow removes the shadow from theimage.
The preview box in the dialog shows how the shadow looks when the settings are adjusted andapplied as follows:
1) Go to Format > Text Box and Shape > Area on the Menu bar to open the Area dialog.
2) Click on Shadow to open the Shadow page.
3) Select the option Use shadow in Properties.
4) Select the shadow position from one of nine positions for casting the shadow from theimage.
5) Select a shadow color from the available color palettes in the Color drop-down list.
6) Enter a distance for the shadow to be offset from the image in the Distance box.
7) Enter a value in the Blur box to create a softer look for the shadow. The higher the setting,the softer the shadow appears. Value of 0 (minimum), the shadow is sharp. The value of150 (maximum), the shadow is at its softest.
8) Enter a percentage in the Transparency box. The value of 0% (minimum), the shadow is
opaque. The value of 100% (maximum), the shadow is transparent.
9) Click on OK to close the Area dialog and save the changes to the shadow setting.

Note
After changing the shadow settings in the Area dialog, these shadow settings areapplied to an image each time Shadow on the Image toolbar is used to apply ashadow.

Formatting images | 17

Figure 16: Image cropping marks

Cropping images
In Impress, images can be cropped using a mouse or a dialog. Mouse cropping is easier, butdialog cropping provides more precise control.

Quick cropping
1) Select an image and use one of the following methods to put the image into cropping
mode and crop marks appear around the image (Figure 16):
– Click Crop Image on the Image toolbar.
– Go to Format > Image > Crop on the Menu bar.
– Right click on the image and select Crop from the context menu.
2) Place the cursor over any of the crop marks and the cursor changes shape. Click, holdand drag the crop mark to crop the image.
– Corner crop marks change width and height of an image.
– Left and right crop marks change the width of an image.
– Top and bottom crop marks change the height of an image.
3) Click outside the image to deactivate cropping mode.

Note
Press and hold the Shift key, then click, hold and drag a crop mark to
proportionally reduce width and height of the image at the same time. Release
the cursor before releasing the Shift key.

Dialog cropping
1) Select an image and go to Format > Image > Crop Dialog Box on the Menu bar to open
the Crop dialog (Figure 17).

18 | Chapter 4, Adding and Formatting Images

Figure 17: Crop dialog

Figure 18: Example of Keep scale cropping

Figure 19: Example of Keep image style cropping2) Crop the image using the options given in the Crop dialog. A preview of the selected
image and cropping results appear in the dialog.
3) To return to the original size of the image and cancel the cropping, click on Original Size.
4) Click OK to save the changes and close the dialog.

Cropping options
The following options are available in the Crop dialog:
Crop
Adjusts the crop size and type of cropping for an image.
Keep scale
Maintains the original scale of the image when cropped. The size of the image changes
to the cropped size (Figure 18).

Formatting images | 19

Keep image size
Maintains the original size of the image when cropped. The scale of the image changes(Figure 19). To reduce the scale of the graphic, select this option and enter negativevalues in the cropping boxes. To increase the scale of the graphic, enter positive values
in the cropping boxes.
Left
If Keep scale is selected, enter a positive amount to trim the left edge of the image, or anegative amount to add white space to the left of the image. If Keep image size isselected, enter a positive amount to increase the horizontal scale of the image, or anegative amount to decrease the horizontal scale of the image.
Right
If Keep scale is selected, enter a positive amount to trim the right edge of the image, ora negative amount to add white space to the right of the image. If Keep image size isselected, enter a positive amount to increase the horizontal scale of the image, or anegative amount to decrease the horizontal scale of the image.
Top
If Keep scale is selected, enter a positive amount to trim the top of the image, or anegative amount to add white space above the image. If Keep image size is selected,
enter a positive amount to increase the vertical scale of the image, or a negative
amount to decrease the vertical scale of the image.
BottomIf Keep scale is selected, enter a positive amount to trim the bottom of the image, or anegative amount to add white space below the image. If Keep image size is selected,
enter a positive amount to increase the vertical scale of the image, or a negative
amount to decrease the vertical scale of the image.
Scale
Changes the scale of the selected image.
WidthEnter the width for the selected image as a percentage.
HeightEnter the height of the selected image as a percentage.
Image Size
Changes the size of the selected image.
WidthEnter a width for the selected image.
HeightEnter a height for the selected image.
Original Size
Returns the selected image to its original size.

Deleting images
Click on an image to display the selection handles and press the Delete or Backspace key.

20 | Chapter 4, Adding and Formatting Images

Figure 20: Image Map dialog

Creating image maps
An image map defines areas of the image (called hotspots) associated with a URL (a web
address or a file on the computer). Hotspots are the graphic equivalent of text hyperlinks. In
Impress, clicking on a hotspot opens the linked page in the appropriate program (for example,
default browser for HTML pages; LibreOffice Writer for ODT files; PDF viewer for PDF files).
Hotspots can be created in various shapes, such as rectangles, ellipses, and polygons, andseveral hotspots can be included in the same image. When clicking on a hotspot, the URL opens
in a browser window or frame that has been specified. Also, text can be specified to appear when
the cursor hovers over a hotspot.
Use the ImageMap dialog (Figure 20) to create or edit a hotspot:
1) Select an image on a slide and go to Tools > ImageMap on the Menu bar and theImageMap dialog opens. The main part of the dialog shows the selected image where
hotspots will be defined.
2) Use the tools at the top of the dialog and the fields to define hotspots and their links.
3) Click on Apply to apply the settings.
4) When finished, click on Save to save the image map to a file and open a file browser.
5) Navigate to the folder where the image map is going to be saved and enter a name forthe image map.
6) Click on Save and the file browser closes.
7) Click on Close to close the ImageMap dialog.
The tools available in the ImageMap dialog are as follows:
Apply
Applies any changes made.
Creating image maps | 21

OpenOpens a file browser window for navigating to a folder where an image map has beensaved.
Save
Opens a file browser window for navigating to a folder where the image map is to be
saved.
Close
Closes the Image Map dialog. A confirmation window opens asking for confirmation ofwhat happens to any changes that have been made.
SelectUsed to select a hotspot that has been created on an image.
Rectangle, Ellipse, Polygon and FreeForm Polygon
Drawing tools for hotspot shapes. These tools work in exactly the same way as thecorresponding tools in the Drawing toolbar. For more information see Chapter 5,
Managing Graphic Objects.
Edit Points, Move Points, Insert Points, Delete Points
Advanced editing tools to manipulate the shape of a polygon hotspot. Select Edit Points
first to activate the other points tools.
Undo
Reverses any previous action taken.
Redo
Carries out any action that has been previously undone.
ActiveToggles the status of the hotspot activating a selected hotspot or deactivating it if active.
Macro
Associates a macro with the hotspot instead of a hyperlink.
Properties
Sets the hyperlink properties and adds the Name attribute to the hyperlink.
Address
Enter the URL address that points to a hyperlink, or to an anchor in a document (forexample a specific slide number). Using an anchor in a document, write the address inthis format: file:///<path>/document_name#anchor_name.
Text
Enter the text that is displayed when the cursor is moved over the hotspot.
Frame
Where the target of the hyperlink opens.
_blankOpens in a new browser window.
_self
Default selection and opens in the current window.
_top
File opens in the topmost frame in the hierarchy.
_parent
File opens in the parent frame of the current frame. If there is no parent frame, thecurrent frame is used.

22 | Chapter 4, Adding and Formatting Images

Tip
The value _self for the target frame works on the vast majority of occasions. It is
not recommended to use the other values, if available, unless absolutely
necessary.

Creating image maps | 23