Every PCB CAD package I've ever used gives you this view while you're laying out the board, so the easiest way would be to just take a screenshot of that.
If you wanted to get a bit fancier then generate it directly from the Gerber files. :)
If you wanted to get a bit fancier then generate it directly from the Gerber files. :)
If every ground point was black, and every V+ trace coloured red, it would help students not to short out their boards.