Samsung 740B User Manual

After pushing the "MENU" button more than 5 seconds, OSD function is 
locked (unlocked). 

You can also adjust the brightness and contrast of the 
monitor with the OSD adjustment locking feature.

 

 

  MagicBright™

Push the MagicBright button to circle through available preconfigured 
modes. 
- Six different modes (Custom/Text/Internet/Game/Sport/Movie)