nx1.info | tmux Cheat Sheet
See also: pluralsight

Session commands:
:new -s session-name

Ctrl+b : Command Prefix

All the following require the command prefix first:

General:
? : See all commands
w : See all panes and windows

Sessions:      Windows:           Panes:
$ : Rename     C : Create         % : vsplit
D : Detach     N : Next           " : hsplit
) : Next       P : Previous       ! : Pane to window
( : Previous   L : Last           
               , : Rename
               . : Change Number
               F : Search

Movement:
[ : Enter copy mode
] : Paste

Copy Mode:
space : start selection
enter : copy selection
esc   : clear selection
G     : Go to bottom
g     : Go to top
/     : search


cli commands:
> tmux ls    : list sessions.

Move window between sessions:
tmux move-window -s session2:0 -t session1: