Basically: different workspace per window.
Because of the way Elements works in terms of copying components (and other things), I often have one project window open with components I want to copy, and a second project window open with the place I want to copy them to. However, Window 1 only needs Components panel showing, while Window 2 needs multiple panels showing.
For instance, FleXon from WeaverPixel really requires the requested feature to be 100% useful. But I’ve had similar issues with copying from Realmac-only projects, too.