How do I know if Head Tracking is working?

Head Tracking status is shown on the main UI:  there is a head icon that changes according to the head tracking status:

• If HEAD TRACKR is ON: 

• If HEAD TRACKR is OFF (either because it's turned off or because it's not yet configured): 

To enable Head Tracking, it requires to be configured: a webcam must be selected, typically during the new user onboarding procedure. Alternatively, you can go to Settings-> Head Tracking, and there you can select the webcam, verify the image preview and enable Head Tracking!

Related Article:

Why my camera's preview window is not working?

How should I disable head tracking?