OFF Keyword - Different Uses
 
  ■ The OFF keyword is used in various statements to disable trapping of
    the following events:
      COM(n) OFF   - events on communications port n
      KEY(n) OFF   - a keypress event on key n
      PEN OFF      - lightpen events
      PLAY OFF     - background music buffer events
      STRIG(n) OFF - events on joystick trigger n
      TIMER OFF    - timer events
      UEVENT OFF   - user-defined events
 
  ■ The OFF keyword is also used to turn off the display of soft-key
    assignments on the bottom line of the screen:
      KEY OFF