! map compose to the Menu key
keycode 117 = Multi_key

! reassign Caps to the Scroll Lock key:
! keycode 78 = Caps_Lock Scroll_Lock
keycode 78 = Caps_Lock
add Lock = Caps_Lock

! Your choice.
! keycode 66 = Control_L
keycode 66 = Escape

clear Lock
clear Control
add Control = Control_L Control_R