Sketchup could use something like this to make scene control a lot easier.
Martin Rinehart wrote a plugin called VisMap which is very similar: http://www.martinrinehart.com/models/rubies/vismap_p_doc.html
Yes, Jim – thanks, that is very similar. Do you know if it’s compatible with SU2015 64-bit Windows?
It can’t be too difficult for those who know how to write extensions (not me in that subset of humanity).