LG ProBeam BU50NST Owner's Manual page 31

How to Use the Projection Screen (Lens) Position Adjustment
Dial
You can use the dial to move the position of the projection screen (lens) without
moving the projector.
Up/Down Dial
CAUTION
• Clicking sounds while rotating the dial indicates that no further adjustment can
be made. Continuing to rotate the dial after reaching the maximum position may
cause damage to the dial.
Left/Right Dial
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