A default background image can be set to appear on every slide. This can be overridden for individual slides if a different background image is needed.
Note: Themes can also be used to introduce a background colour to work in parallel with the background images. This colour appears on all slides that do not have a background image set. Refer to Setting a theme
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To set a default background image
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Open the book.
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Open the Presentation metadata slide.
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Add the required background image onto the first line of the topic.
For information about image dimensions and scaling, refer to Image size requirements
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Apply the BackgroundImage style.
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To set a background image for an individual slide
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Open the topic.
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Add the required background image onto the first line of the topic.
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Apply the BackgroundImage style.