---
title: "MultiLayerViewer..::.UndoRedoTrackingEnabled Property "
canonical: https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_WinControls_MultiLayerViewer_UndoRedoTrackingEnabled.htm
product: "Graphics Mill 5.5 for .NET"
---

This documentation is for the old version. [Go to the latest Graphics Mill docs](https://www.graphicsmill.com/docs/gm/)

# MultiLayerViewer.UndoRedoTrackingEnabled Property 
 
Enables or disables the automatic change tracking.
 
**Namespace:** [Aurigma.GraphicsMill.WinControls](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_WinControls.htm.md)
 **Assembly:** Aurigma.GraphicsMill.WinControls.VectorObjects (in Aurigma.GraphicsMill.WinControls.VectorObjects.dll)
 
## Syntax
  
```
<BrowsableAttribute(True)> _
Public Property UndoRedoTrackingEnabled As Boolean
```
 
```csharp
[BrowsableAttribute(true)]
public bool UndoRedoTrackingEnabled { get; set; }
```
 
### Property Value
A value specifying whether the automatic change tracking should be enabled or not.
 
### Implements
 
[IVObjectHost.UndoRedoTrackingEnabled](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_WinControls_IVObjectHost_UndoRedoTrackingEnabled.htm.md) 
 [IStateNavigable.UndoRedoTrackingEnabled](https://www.graphicsmill.com/docs/gm5/P_Aurigma_GraphicsMill_IStateNavigable_UndoRedoTrackingEnabled.htm.md)
 
## Remarks
  
If this property is set to **false**, the undo/redo functionality will be available, but you will have to manually save states to which the content can be reverted (using the [SaveState()](https://www.graphicsmill.com/docs/gm5/M_Aurigma_GraphicsMill_WinControls_MultiLayerViewer_SaveState.htm.md) method).
 
If this property is set to **true**, such changes as the following will be tracked automatically:
 
- Adding or removing objects and layers.
- Changes of layer lock and visibility.
- Changes of object z-order.
   
## See Also

### Reference

- [MultiLayerViewer Class](https://www.graphicsmill.com/docs/gm5/T_Aurigma_GraphicsMill_WinControls_MultiLayerViewer.htm.md)
- [Aurigma.GraphicsMill.WinControls Namespace](https://www.graphicsmill.com/docs/gm5/N_Aurigma_GraphicsMill_WinControls.htm.md)