Huawei MateView GT User Manual page 14

Locking/Unlocking the joystick
Locking the joystick: With the monitor powered on and the OSD menu not displayed,
•
press and hold the joystick forwards when facing the monitor until a message is displayed
indicating that the joystick is locked. After the joystick is locked, you will not be able to
press it to power on or off the monitor or configure the OSD settings.
Unlocking the joystick: With the monitor powered on, press and hold the joystick forwards
•
when facing the monitor until a message is displayed indicating that the joystick is
unlocked.
Using the Five-Way Joystick to Power on/off and Configure the OSD Settings
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