Have a slightly confusing issue with Airplay. I want to use my TV as a second display via Apple TV - principally so I can play video etc on the TV while still being able to use my laptop display for other work etc. I have setup Airplay to use my TV as a separate display - all good. What I can't figure out is how (or even if it's possible) to use my TV as its own space/desktop. If I drag a, for example, Chrome window, to the right, it will go across to my tv screen. That display though doesn't show up anywhere in Mission Control. Is this the normal/expected behaviour? Ideally I'd like to be able to fullscreen a video in Chrome on my laptop and then switch it over to the TV display. Many thanks!