press lock on the remote control or keypad on the projector for 3 seconds. press lock on the remote control. a confirmation
message * are you sure to lock panel keys*
display select yes to confirm
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to release panel key lock
1. press lock on the remote control directly. the panel key are unlock
2.press lock on the keypad on projector a message is displayed. panel keys are locked .please press lock key for 3 seconds to unlock panel keys