# Tangent

> Include the Tangent on the mesh vertices.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.UIModule

```csharp
Tangent = 16
```

### Remarks

This channel isn't likely needed unless you are expecting lighting to be applied to the [Canvas](/engine/6000.7/script-reference/unityengine/canvas.md). Reminder that a Overlay [Canvas](/engine/6000.7/script-reference/unityengine/canvas.md) can not have lighting applied.