Menu path: Setup > System > Power Options > Display
In this area, you can configure screen settings which can help to reduce energy consumption.
Display Power Management Settings
Brightness Reduction
- On inactivity reduce to: Specify to how many percent the screen brightness should be reduced if you are not using the device for battery and AC operation. (default for battery: 20%, default for AC operation: 80%)
- Reduce after: Specify a time between 10 and 120 seconds after which the screen brightness will be reduced for battery and AC operation. (default: Never)