Also, I'm using LayAuto software for window placement on a large display (split display in various sized grids - let me know if you want me to share my defaults). This is absolutely invaluable, as otherwise you spend most of your time arranging windows. Another one I've used and likes is Magnet, but it didn't allow me to customise the split and the keyboard shortcuts. Source: over 2 years ago

Here's a solution if you don't want to manually resize. I use a windows utility (Sizer) http://brianapps.net/sizer/ to size the window on the other monitor to fit the screen, That way it looks maximized but doesn't prevent me from switching to other windows. I've bound the Sizer app to a keyboard shortcut. That way I can detach the mixer, move it to the 2nd monitor, then use Sizer to max. Source: over 2 years ago