How to set up tmux pane resize option (OSX)

 you gonna add below to your .tmux.conf file:

set-option -g prefix C-s
bind j resize-pane -U 2
bind k resize-pane -D 2
bind h resize-pane -L 2
bind l resize-pane -R 2

C means simply control-key.

in your .tmux.conf file.

then you gonna reload the tmux for it is not automatically going to be reloaded:

$ tmux source-file .tmux.conf

Finally,

If you push button [Control + s(meta key)] then [ j] , your pane is going to move upwards by 2 degrees.

Else, the same