As well as the HIDE OTHERS command when selecting a particular body in a multi-body part, it would be useful to have an ISOLATE command which permanently hides other bodies in the part. I'll give an example where this is useful.
Say I design a multi-body part and create a lot of views which I use to isolate each individual body (so I can generate separate drawings for each body) by selecting the appropriate view. Then as soon as I create another body within the Master View, this new body is added to each and every other view I have created, even though I have previously selected to HIDE OTHER bodies within each of these views. This is not my intended result. I want to isolate the body permanently. So despite generating new bodies either BEFORE or AFTER the creation of this view, the body is ALWAYS isolated, not just temporarily at the time of view creation.
Another option is to forget the ISOLATE command previously suggested, and just change the behaviour of the HIDE OTHERS command as I have already suggested.