• Constructors

• Registering Undo Operations

• Checking Undo Ability

• Performing Undo and Redo

• Limiting the Undo Stack

• Creating Undo Groups

• Disabling Undo

• Checking Whether Undo or Redo Is Being Performed

• Clearing Undo Operations

• Setting and Getting the Action Name

• Getting and Localizing Menu Item Title

• Working with Run Loops

• beginUndoGrouping

• canRedo

• canUndo

• disableUndoRegistration

• enableUndoRegistration

• endUndoGrouping

• groupingLevel

• groupsByEvent

• isRedoing

• isUndoing

• isUndoRegistrationEnabled

• levelsOfUndo

• redo

• redoActionName

• redoMenuItemTitle

• redoMenuTitleForUndoActionName

• registerUndoWithTarget

• registerUndoWithTargetAndArguments

• removeAllActions

• removeAllActionsWithTarget

• runLoopModes

• setActionName

• setGroupsByEvent

• setLevelsOfUndo

• setRunLoopModes

• undo

• undoActionName

• undoMenuItemTitle

• undoMenuTitleForUndoActionName

• undoNestedGroup

• CheckpointNotification

• DidOpenUndoGroupNotification

• DidRedoChangeNotification

• DidUndoChangeNotification

• WillCloseUndoGroupNotification

• WillRedoChangeNotification

• WillUndoChangeNotification