enableUndoRegistration()
Enables the recording of undo operations.
Declaration
func enableUndoRegistration()Discussion
Because undo registration is enabled by default, it is often used to balance a prior disableUndoRegistration() message. Undo registration isn’t actually re-enabled until an enable message balances the last disable message in effect. Raises an NSInternalInconsistencyException if invoked while no disableUndoRegistration() message is in effect.