LG ProBeam BF50NST Manuel D'utilisation page 23

Adjusting the menu
When the projector is turned on, press the joystick button one time.
You can adjust the menu items moving the joystick button left, right, up, or down. Move
to the desired menu item, and then press the joystick button once to select it.
Turns the power off.
Changes the input source.
Clears on-screen displays and returns to projector viewing.
Displays the Settings menu.
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