On my previous setup (Fusion 7) I had the "full screen" Fusion as a window. As such, my "side" display was happily showing whatever Mac apps that were there.
Now, even though I have Fusion in a single window (main iMac display) my side display is black. When working on Windows I _do_ need that side display with those essential apps - And I don't want Unity or Single Window view.
Essentially: I can't find any setting to put Fusion into the same display Space as all other apps under Mac.
I recall fixing this in Fusion 7 (years ago) but can't seem to find it now.
Mac OS 10.14