On/Off button labels on Apple Watch
Turn on button labels to see an additional position indicator. With labels on, you see a one (1) on any option that is on, and a zero (0) on options that are turned off.
Add labels to On/Off buttons
Open the Settings app on your Apple Watch.
Tap Accessibility, then turn on On/Off Labels.
You can also use your iPhone to turn on labels for your Apple Watch—open the Apple Watch app on your iPhone, tap My Watch, tap Accessibility, then turn on On/Off Labels.