I have Morrowind Overhaul installed and I am playing windowed at a lower res than my native (1080p). Is there a way to get the client to run windowed but w/o borders so I can run it at native resolution windowed?

MGE states that I must use windowed mode for Arbitrary Resolutions. I'm not sure what that means but I assumed it meant non-native resolutions. Auto-Hotkey does not work to do this like it does with other programs.