# Custom

> Any tool that is not one of the built-in tools.

## Definition

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

```csharp
Custom = 6
```

### Remarks

See also [EditorTool](/engine/6000.6/script-reference/unityeditor/editortools/editortool.md).