# IUndoInfoDef Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

Defines if an object should contain information on the number of possible undo and redo.

#### Properties

"qUndoInfoDef": {}

The numbers of undos and redos are empty when an object is created. The number of possible undos is increased every time an action (for example, create a child, set some properties) on the object is performed. The number of possible redos is increased every time an undo action is performed.

## Syntax

```
[ValueClass]
public interface IUndoInfoDef : IAbstractStructure
```