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# ARPlaneAnchor.Alignment

The kinds of alignment — horizontal or vertical — that a plane anchor can have.

```
enum Alignment
```

## Topics

### Alignment Values

[`ARPlaneAnchor.Alignment.horizontal`](/documentation/ARKit/ARPlaneAnchor/Alignment-swift.enum/horizontal)

The plane is perpendicular to gravity.

[`ARPlaneAnchor.Alignment.vertical`](/documentation/ARKit/ARPlaneAnchor/Alignment-swift.enum/vertical)

The plane is parallel to gravity.


---

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