1. Connect the Glass device to your PC via the USB-C cable.
2. On your Glass display, from the home screen navigate to the Settings menu and tap once.
3. Swipe right five times to Developer options and tap once.
4. You will see Enable (or Disable) developer options and swipe once to the right.
5. Here you will see USB debugging Disabled.
6. Tap once and the display will say Enable USB debugging.
7. Tap once again and the display should now read USB debugging Enabled.