property Chart.AllowUndoRedo as Boolean
Enables or disables the Undo/Redo feature.

TypeDescription
Boolean A Boolean expression that specifies whether the Undo/Redo operations are enabled or disabled.
By default, the AllowUndoRedo property is FalseThe Undo and Redo features let you remove or repeat single or multiple actions, but all actions must be undone or redone in the order you did or undid them Ė you canít skip actions. For example, if you change the value of three cells in an item and then decide you want to undo the first change you made, you must undo all three changes. To undo an action you need to press Ctrl+Z, while for to redo something you've undone, press Ctrl+Y. The CanUndo property retrieves a value that indicates whether the chart may perform the last Undo operation. The CanRedo property retrieves a value that specifies whether the chart can execute the next operation in the chart's Redo queue. Call the Undo method to Undo the last chart operation. The Redo redoes the next action in the chart's redo queue. The UndoRedoQueueLength property gets or sets the maximum number of Undo/Redo actions that may be stored to the chart's queue, or in other words how many operations the chart's Undo/Redo manager may store. 

The records of the Undo/Redo queue may contain actions in the following format:

The records of the Undo/Redo queue may contain actions in the following format (available starting from 23.0):

Also, the Undo/Redo queue may include:

The ChartStartChanging(exUndo/exRedo) / ChartEndChanging(exUndo/exRedo) event notifies your application whenever an Undo/Redo operation is performed. The UndoListAction property lists the Undo actions that can be performed in the chart. The RedoListAction property lists the Redo actions that can be performed in the chart. Use the UndoRemoveAction method to remove the last actions from the undo queue. The RedoRemoveAction method removes the first action to be performed if the Redo method is invoked.