Something like this? http://www.andrewscheller.co.u.....dules.html
Wow! that"s very cool, and also useful. Nice work!
One thing that comes immediately to mind is to have the option to view the populated board, as well as the bare board. Sort of like the Google "Map" or "Satellite Photo" view. Or even both views at once, if you have the screen real estate.
You mean something like http://elinux.org/RPi_xray_wallpapers
That image, and all the ones in this thread, have been created from my same (recently updated) high-res GIMP project. Feel free to have a play yourself I don't have a RPi myself yet, so I don't have a "satellite view" of the bottom of the board.
At first I expected to have to press a button for each group to highlight. Having it work immediately by mouse-over does make it quick, but you might prefer a button-press if you are using the image as a reference and want a group to stay highlighted while you use your mouse to open another document elsewhere.
Quick update before bed - you now have the choice of "hover mode" or "click mode"