tmux cycle window layouts

In tmux when you have opened a few terminals, you can cycle common window layouts using:

^b [spacebar]

This works for any amount of windows, great for quick 2 or 3 window configurations to get one big window and a smaller one.

I usually have vim open in one and the commandline in an other one. Sometimes a Python console in another one. Tagging this with vim too because a lot of people combine them.