All, I have created a macro that functions nearly the same as Isolate, except it isolates parts by a pre-selected mate. Whenever there was a faulty mate, I had to go through my large assemblies and find the small bolts & nuts that had the problems and then fix them in the feature manager, which was annoying and time consuming. This takes that time away by selecting the mate itself. The macro creates a temporary Display State of the mated items and hides everything else; when you exit, the temporary Display state is deleted. Let me know what you think (use of macro, code design, etc.) and enjoy!