# isProcessing

> Returns true if the editor is currently processing undo or redo operations, false otherwise.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public static bool isProcessing { get; }
```

### Remarks

**Note:** it is forbidden to call [Undo.RegisterCreatedObjectUndo](/engine/6000.7/script-reference/unityeditor/undo/registercreatedobjectundo.md) while this value is `true`.