On this page: Pictures
You can add a picture by clicking with the right button of the mouse on
the section where you want to add the picture and choose "add a picture" in the
contextual menu.
If you double click on the "picture control" to see the picture properties
window.

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If your picture is always the same picture. Choose "File" and write the path to
the file here.
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If the path of your file can be found in one field of your
database, choose "filename in field" and select in the list the field which
contains the path to the picture to show.
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Check here if the aspect ratio has to be kept. Otherwise the picture will be
stretched in the full area of the picture control.