Samsung Galaxy Watch Ultra
Android Wear OS
1 Find "Display"
Slide your finger upwards starting from the bottom of the screen.
Press the settings icon.
Press Display.
2 Turn automatic brightness on or off
Press the indicator next to "Adaptive brightness" to turn the function on or off.
3 Adjust screen brightness manually
Press Brightness.
Slide the circle to select the required brightness.
4 Return to the home screen
Press the Home key to return to the home screen.