Samsung SyncMaster 245B, 245BW Owner's Manual page 34

When pressing the MENU button after locking the OSD
Menu
This is the function that locks the OSD in order to keep the current states of
settings or prevent others from adjusting the current settings.
Locked : Hold down the menu button for more than five seconds to activate the
OSD adjustment lock function.
OSD Locked &
Unlock : Hold down the menu button for more than five seconds to deactivate
Unlock
the OSD adjustment lock function.
Though the OSD adjustment lock function is activated, you can still adjust
the brightness and contrast, and adjust MagicBright (
button.
MagicBright™
Description
) using the Direct