How to use the lock screen of the watch?
Swipe down on the watch face and tap the lock screen icon to enable the lock screen feature. After the lock screen feature is enabled, the watch screen will be locked and no operation can be performed before you short press the physical button to unlock the screen.
If you need to put the watch in your pocket, the lock screen is recommended to be enabled to prevent unintended touch. When you wear the watch to a bath, water droplets splashing onto the watch screen may also cause unintended touch, and turning the lock screen on can solve that problem.