# ClearUndo(Object)

> Removes all Undo operation for the identifier object registered using Undo.RegisterCompleteObjectUndo from the undo stack.

## Definition

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

```csharp
public static void ClearUndo(Object identifier)
```

### Parameters

**** (\[Object]\(/engine/6000.7/script-reference/unityengine/object)):