# AlwaysOnAtlas

> Always pack all the SpriteAtlas.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.6/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
AlwaysOnAtlas = 4
```

### Remarks

Trigger packing when going into Play mode or building player/bundles.

Legacy sprite packer will not be used.