I'd love an option to hide the multi-monitor taskbar if fullscreen app is running -- this would particularly come in handy with games that do not run in my monitor's native resolution.
I have my mm taskbar on my primary monitor and my normal one on the secondary, and I'm noticing that if a fullscreen app (game) runs that does not run at my normal resolution, the mm taskbar is stretched into the second monitor, making part of the default windows taskbar inaccessible.
As a workaround I now use the auto-hide setting, but I'd prefer not to use that.
This may not be a perfect solution, but in the DisplayFusion Settings window, on the Compatibility tab you can add your game and force DisplayFusion to unload it's taskbars when it detects that game.