brew install tmuxinstall tmux with homebrew (macOS)
Dto close a pane, exit tmux
tmux is controlled by a key combination of a prefix key, ‘C-b’
Ctrl-b by default, followed by a command key.
?to open a list of all key bindings
%to open a new pane (horizontal)
"(double-quote) to open a pane (vertical)
B, then arrow key (left/right/up/down) to move between panes (horizontal)