If you have interest in how to adjust the screen brightness, please refer to the following information:
1. The Redmi Watch 4 turns on auto brightness by default, and the watch brightness will be adjusted automatically according to the ambient light. You can go to [Settings] >> [Display & Brightness] >> [Screen Brightness] >> [Auto Brightness] to set the auto brightness;
2. 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. You can go to [Settings] >> [Display & Brightness] >> [Screen Brightness] >> [Customized Brightness] >> select the appropriate brightness level.
Note:
1. Customized brightness can be operated only after auto brightness is turned off;
2. If one-tap to light up the screen is enabled, it is supported when the screen is on.