![](/images/new-backgrounds/1263140/26314061x1.webp)
4. Blue Screen
1)Press the up(▲) or down(▼) button to select the Blue Screen.
2)Press the right() or SOURCE/SELECT button.
3)Press the up(▲) or down(▼) button to select the On or Off.
4)Press the MENU button to save.
5. Key Lock
1)Press the up(▲) or down(▼) button to select the Key Lock.
2)Press the right() or SOURCE/SELECT button
3)Press the up(▲) or down(▼) button to select the On or Off
4)Press the MENU button to save.
※How to unlock
1)On the front key: Press the SOURCE/SELECT and MENU button at the same time over 3 seconds.
2)On the Remote Controller: The Remote Controller operates well because the Key Lock function is only allowed for the front key of this product.