K5902133 (451920612483)-02 MDSC-825526Overview of shortkeys1 2 3Image 4-31. Main source selection2. Brightness decrease3. Brightness increase4.5.1 Main source selectionTo quickly select the main sourcePress the key to scroll through all the possible input signals and quickly select the main source.Available main source options may differ depending on display model.To avoid unwanted or accidental activation of any function through the keyboard all keys,except thePower On/Off, can be locked using a dedicated OSD Menu function (see “Control lock: OSD menulocking/unlocking”, page 26).4.5.2 Brightness adjustmentTo quickly adjust the brightnessWhile no OSD menu is on the screen, press the or key to adjust the brightness as desired.Brightness50Image 4-44.6 Control lock: OSD menu locking/unlockingAbout the OSD lockAs described in “OSD lock”, page 40, the OSD lock can be enabled to avoid unwanted access. When the OSDis locked, pressing the key after unlocking the keyboard will not activate the OSD menu, but will make theOSD lock window appear. The OSD menu can only be accessed after pressing a sequence of keys.OSD lockSequence: 5 - 6 - 6 - 3Image 4-5To lock/unlock the menuWhen the OSD lock window appears, press the following key sequence to unlock the OSD menu:Daily operation