!!
!! NOTE: The program 'xev' can be used to find keycodes.
!!
!! Switch Ctrl and Alt keys
!! Make the Caps Lock key do BackSpace
!!
!!
clear Control
clear Mod1
clear Lock
keycode 37 = Alt_L
keycode 64 = Control_L
keycode 109 = Alt_R
keycode 113 = Control_R
keycode 66 = BackSpace
add Mod1 = Alt_R
add Control = Control_R
add Mod1 = Alt_L
add Control = Control_L