just asking but does anyone of an extension that treats the blue outline of a group as a line this means that if wanted to move a group to fit with another group i can do with ease
I’m not sure why you want to do this. You can click the move tool on any point of a Group and move that location to align with any point on another Group without using an extension. The blue outline is a bounding box that doesn’t necessarily touch any point of the Group!
You might find these helpful.
Guide Tools
http://extensions.sketchup.com/en/content/guide-tools
Draw Boundingbox
http://extensions.sketchup.com/en/content/draw-boundingbox