Huawei P40 Pro
Android 10.0
1 Find "Display & brightness"
Press Settings.
Press Display & brightness.
2 Adjust screen brightness
Press the field next to "Automatic" to turn automatic brightness on or off.
Drag the brightness indicator right or left to set brightness level manually.
3 Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.