# xmodmap > Utility for modifying keymaps and pointer button mappings in X. > More information: . - Swap left-click and right-click on the pointer: `xmodmap -e 'pointer = 3 2 1'` - Reassign a key on the keyboard to another key: `xmodmap -e 'keycode {{keycode}} = {{keyname}}'` - Disable a key on the keyboard: `xmodmap -e 'keycode {{keycode}} ='` - Execute all xmodmap expressions in the specified file: `xmodmap {{path/to/file}}`