tmux
tmux!
ctrl + b + [- arrow keys or
shift + page up/down
control + c (or q) when done
panes
open another pane:
ctrl b + " split vertically
crtl b - % split horizontally
close pane:
switch between panes:
crtl b + left
crtl b + right
crtl b + up
crtl b + down
crtl b + o go to next pane
crtl b + ; go to the last previously used pane