Hi okapi - actually clicking and dragging to reposition background images is already working, but to avoid accidentally moving them around while you are drawing it is only enabled while you are inside of the View / Image command.

So start up that command, then you can go in drag images around - if you drag nearby the inside corner of an image, it will snap and grab on to the corner point of the image to allow you to precisely align it to something else, and you can use the edit frame grips to do scaling or rotation.

- Michael