This can be set by itself, can be steady on or can be displayed. You can do the following to select the mode you want.
1. First, we need to tap \"Settings\" on the applewatch.
2. Then click \"Display and Screen Brightness\".
3. Then click the Screen Light option.
4. After entering, select Turn off the steady on.
5. After the device is turned off, the battery power of the applewatch is greatly saved and the service life of the battery is extended. The operation method is the same when the device is turned on.