> But if I want everything from B2 to get displayed on monitor A, I have to create a new space An+1 and drag everything over one window at a time, like a cave m

> But if I want everything from B2 to get displayed on monitor A, I have to create a new space An+1 and drag everything over one window at a time, like a cave man. That's...not true, though? Unless I'm misunderstanding what you're after... When you activate Mission Control (not sure offhand what the default shortcut is; I have mine set to Ctrl-Up, but I might have customized it), you can drag entire spaces between monitors. I do this regularly.