LG LCD5100-BN Owner's Manual page 16

Installation
4. Adjust the zoom.
4-1. Unlock the zoom lever.
4-2. Move the lever to adjust the zoom.
4-3. Lock the lever.
16
WIDE
TELE
WIDE
TELE
5. Adjust the focus.
5-1. Unlock the focus lever.
5-2. Move the lever to adjust the focus.
5-3. Lock the lever.
FAR NEAR
FAR NEAR