If I have many body-only layouts (no header, no footer, nothin else). Where is it better to insert an image that covers the layout surface completely. As a body image or as as background image, or both ?
Won't make a huge difference. Background would help make sure that nothing get's "lost" behind it. On the other hand, if you need this image on multiple layouts, you may want to insert it into a container field on your layout so that you can update the image on all layouts by updating the field inserted into the field.
It mostly depends on what you are doing with the image.
If your "Layout Background" (Inspector, Appearance tab, & regardless of other parts), is:
Graphic > Fill: Image
Then you have these options:
Scale to Fit
Scale to Fill
So, your option and whether you want the graphic "fixed" or "resizeable based on viewport" or variations in the list above, are what determines if it's place:
on the layout (all parts),
on the layout in a single part only,
or in a container (may not resize?)
Within limits, auto-size anchors can resize an object--including one in a container to fit the current window size. Or you can remove all auto-size anchors to leave always the same size, but centered on the layout.
Thank you for this answer. I think that the "nothing lost behind" argument will determine my choice of inserting the image as a background image with the Scale to Fill option.
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