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# userFaceTrackingEnabled

A flag that determines whether ARKit tracks the user’s face in a world-tracking session.

```
var userFaceTrackingEnabled: Bool { get set }
```

## Discussion

When enabled, ARKit provides you with an [`ARFaceAnchor`](/documentation/ARKit/ARFaceAnchor) that represents the user’s face during your world tracking session. For example, you can share avatar expressions with multiple users in a multiplayer game, or enable the player to control a virtual object in the physical environment using facial expressions.

Check whether the device supports tracking of the user’s face by using [`supportsUserFaceTracking`](/documentation/ARKit/ARWorldTrackingConfiguration/supportsUserFaceTracking) before enabling this property.

---

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