I was working with SketchUp just now, and at some point I realized that the x-ray effect was being applied to objects I selected, and if I hovered over a component while using the move tool, the face that my cursor was over would become transparent. This was very helpful, because I could actually select an edge or point that I would normally not have been able to select without hiding objects or tags.
While the regular X-ray or Back-edges works fine, it can be a little overwhelming/chaotic if all lines are suddenly visible.
I think this is not an intended function, since the effect disappeared when I saved my file, and I don’t know how I would have turned it on (if it is a function, please tell me how to activate it, because it was really useful).
I have included a small video to show the selection part. For some reason my cursor is not in the correct place in this video.
I have some extensions that might have caused this, but again, I don’t know how I would have turned it on, so I doubt it would be intentional either way.