Q: stuck in zoom mode and can't unlock

Turn your watch off and back on. If this does not help, press and hold the side button and the Digital Crown for 10 seconds or more, until the Apple logo appears on the screen.

https://support.apple.com/en-us/HT204510

Hi

• To turn off Zoom (an accessibility feature) on your watch:
  • On your iPhone, in the Watch app, go to: My Watch (tab) > General > Accessibility > Zoom - turn off.
  • Or on your watch, go to: Home screen (via a single press of the Digital Crown) > Settings (cog icon) > General > Accessibility > Zoom - tap and turn off / on.

• If the Accessibility Shortcut has been enabled and configured for Zoom, you can also enable and disable the feature more conveniently:
  • On your watch: quickly press the Digital Crown (the round button) three times.

• To configure the Accessibility Shortcut:
  • On your iPhone, in the Watch app, go to: My Watch > General > Accessibility > Accessibility Shortcut (at the bottom) > select / deselect Zoom.

To return the screen contents to normal size in order to unlock your watch, double-tap the display with two fingers.