Read-write property, allows the freezing of Push, Undo or Redo operations the undo-redo manager.

A Boolean value.  

object.Disabled [= value]

The Disabled Property syntax has these parts:

Flush still works even if Disabled is True.

Setting MaxSize to zero will also effectively disable all undo support, but it will result in the undo stack being emptied immediately. If you set the Disabled property True, then calls to Push, Undo and Redo will do nothing but they will leave the current stack contents unchanged. You might want to do this if you have done your own Push for some operation but then are calling other methods as part of that operation that do their own Push(es).