To configure locking the Xiaomi Watch S4, please refer to the following details:
1. By default, if there is no operation within 5 seconds, the screen will automatically be locked. You can modify the time of locking screen in settings, which can be configured in the range from 5 seconds to 5 minutes;
2. The watch supports the function of covering to sleep. After enabling it, cover and touch the watch with your palm and when the covering area exceeds half of the watch, the watch will directly change from screen on to screen off. Please go to [Settings] >> [Display] >> [Cover to sleep] on the watch;
3. Turn the wrist around to make the screen off. After enabling the function of turning the wrist around to make the screen off, the screen will be off if you turn your wrist inversely.