How to use this guide These symbols can be supplemented by small icons or text. Lift the receiver. Line key. Hang up. Specific key on numeric keypad. Numeric keypad. Partial view of display.;. Means that the function is subject to programming. If necessary, contact your installer. Means that the function can be accessed by pressing a programmed key - see Programming the programmable keys. Adjustment “reduce”. Fixed key. Adjustment “increase”. MENU key. Loudspeaker, hands free. Voice mail access