General use
GENERAL USE................................................................................................................ 1.2
CONSTANT KEYS ........................................................................................................... 1.3
RETURN KEY.......................................................................................................... 1.3
TRACTOR INFO KEY.............................................................................................. 1.3
CONTRAST ............................................................................................................. 1.3
MEMORY KEY......................................................................................................... 1.4
HOLD KEY............................................................................................................... 1.4
DELETE KEY........................................................................................................... 1.4
BACKGROUND LIGHT............................................................................................ 1.4
NUMERICAL KEYS ................................................................................................. 1.4