I frequently use the HIDE elements tool to temporarily hide things that are making it hard to see what I'm trying to work on. I would love to have the option to temporarily show hidden elements. A useful feature to go with that would be the option to UNHIDE specific elements that have been hidden.
I'm envisioning something similar to what is available in Revit. In Revit, you can "reveal hidden elements" and those items show up as red while everything else is screened back. This makes it easy to unhide specific elements and then turn off Reveal Hidden elements. Then I can get back to work.
Currently, you have to unhide EVERYTHING and then re-hide the things you do want hidden.