I don't know if a recent update changed this behaviour, my memory might be fuzzy.
I'm pretty sure that in the past, candidate objects were highlighted (bounding box, centre lines) only when n object was being moved.
Now the "Show Snapping Candidates" option seems to set it on all the time - or always off.
Please can we have it revert to the previous behaviour because the display gets too crowded when these bounding boxes are on all the time, making it difficult to see the work itself.
Thanks!