A friend recently asked if there is an easy way to find out what elements are currently involved in a Copy/Monitor relationship. Good question! No easy button exists for this that I'm aware of. Sure we can select all grids and looks for C/M monitoring icons. That's not too hard for levels and grids. It's much less fun for walls, columns, floors or any of the MEP related categories that can be involved.
It might be an interesting question/problem for enterprising Dynamo aficionados or API programmers?
It would be nice to generate a report of the elements in a relationship and with which model and elements their relationship is based upon. I think it is just another example of the kind of refinement that Revit's collaboration tools ought to have.