# Sandbox.Scene.ISceneEditorSession.AddUndo

```csharp
void AddUndo(string name, System.Action undo, System.Action redo)
```

Add a new undo entry

### Parameters

- `name` (`string`)
- `undo` (`System.Action`)
- `redo` (`System.Action`)

Declared in [Sandbox.Scene.ISceneEditorSession](/api/Sandbox.Scene.ISceneEditorSession).
Assembly: `Sandbox.Engine`.