I have the Mini all setup but when screen sharing, it will not fill my 24" external monitor. I have nearly 4" of black border on each side and 1.5" top and bottom.
I share with my iMac but I think because that one has a 24" screen, it’s pretty close.
Is there a way to get a bit more screen space? I found a very old article on how to set displays but that option doesn’t exist anymore (that I found)
When it’s plugged into the external monitor directly, it works fine.
MBPr 2015 running Sierra
Mac Mini 2014 Running Catalina
Sharing to the Mini from the MBP