tmux pane

C-b % split horizontal

C-b " split vertical

C-b x close current pane

C-b t show clock in current pane

C-b o select next pane

C-b <arrow> select the pane that arrow indicated

C-b { swap the current pane with the previous one

C-b } swap the current pane with the next one

C-b z maximizes the current pane to full-screen