How to adjust the dial brightness on Redmi Watch 4?

The brightness of the watch supports automatic adjustment, or you can set the brightness manually.
Auto Brightness: The watch turns on auto brightness by default, and the watch brightness will be adjusted automatically according to the ambient light.
Setting method: Go to [Settings] >> [Display & Brightness] >> [Screen Brightness] >> [Auto Brightness].
Customized Brightness: Customized brightness adjustment is divided into 255 levels. It supports adjusting the brightness by pressing buttons to increase or decrease step by step and sliding the brightness bar to adjust the brightness.
Setting method: Go to [Settings] >> [Display & Brightness] >> [Screen Brightness] >> [Customized Brightness] >> Select the appropriate brightness level.
Note:
Customized brightness can be operated only after auto brightness is turned off.