16Locking Keys and PTT switch1. Press and hold the [6] key, “LOCK” is displayedon the LCD for one second, the “ ” icon appearson the LCD, and then the keys are locked.• The keys and the PTT switch may be selected to be locked using Set Mode [18LOCK]( 27). The default setting is the “LK KEY” (the keys are locked).• The MONI/T-CALL switch, the PWR/VOL knob and the Emergency key cannotbe locked.2. Press and hold the [6] (LOCK) switch again, “UNLOCK” will be displayedon the LCD, the keys are unlocked.Programmable key [P1]/[P2][P1] and [P2] keys may be used for the followings:• One Touch Recall of a preferred setting• One Touch Recall of the Mode settings(1) One touch recall of the preferred status1. To store a preferred setting, Press and hold one of the [P1] or [P2]keys.2. To recall a stored one touch preferred status, press the associated [P1]or [P2] key.(2) Set Mode Recall feature1. Press and hold the Function key, and then press the [] or [] key toselect the desired Set Mode item.2. When the desired Set Mode item is displayed on the screen, pressand hold one of the [P1] or [P2] keys to store the Set Mode item.3. To recall a stored one touch preferred Set Mode, press a [P1] or [P2]key to recall the assigned Set Mode Item.(3) Preset Functions assigned to the [P1] and [P2] keysPress the Function key, then press the [P1] or [P2] keys to recall the presetfunctions as listed in the table at the below. These Function key functions maynot be changed.Key FunctionFunction key + [P1] HOME channelFunction key + [P2] Reverse function