You can. I'm doing it right now. They don't like to stretch over the menu bar (i.e. top screen has no menu bar, bottom screen does, trying to stretch window fro

You can. I'm doing it right now. They don't like to stretch over the menu bar (i.e. top screen has no menu bar, bottom screen does, trying to stretch window from top to bottom) but they happily stretch left to right — or top to bottom if the menu bar is on the top screen.