LG E1940S Owner's Manual page 13

Control Panel Functions
Front Panel Controls
MENU Button
MODE Button
E1940S/E2040S/E2240S/E2340S
OSD LOCKED/UNLOCKED
This function allows you to lock the current control
settings, so that they cannot be inadvertently changed.
Press and hold the MENU button for several seconds.
The message "OSD LOCKED" should appear.
You can unlock the OSD controls at any time by pushing
the MENU button for several seconds. The message
"OSD UNLOCKED" should appear.
Use this button to enter F-ENGINE, ORIGINAL RATIO,
PHOTO EFFECT menus.
For more information, refer to page 21.
12