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RadPageView does not support undo/redo operations out of the box and you have to implement this functionality on your own. For example, you can subscribe for PageIndexChanged event and add there a logic for the undo operation. Please refer to the code snippet below:
sender, RadPageViewIndexChangedEventArgs e)
PageViewOperation(OperationType.IndexChange, e.NewIndex, e.OldIndex));
For further details, consider the this article
which describes the memento pattern.
If you have other questions, do not hesitate to ask.
the Telerik team