I've never really used spaces, I remember them being introduced but they didn't really take for me. Anyway to see what all the fuss is about I've installed Gri

I've never really used spaces, I remember them being introduced but they didn't really take for me. Anyway to see what all the fuss is about I've installed Gridlion but… how can I move an app to another space? I was expecting to be able use to a keystroke to "flick" an app up/down/left/right onto another space.