Undo and redo actions
Reverse previous actions.

Undo
Undo the last action.

UndoMultiple
Display a list of recent commands to reverse.

UndoSelected
Reverse recent changes for a single object only.
Redo actions

Redo
Reverse the last Undo.

RedoMultiple
Reverse the Undo command multiple times.
See also

ClearUndo
Clear the undo buffer to free memory.

UndoView
Undo the last view change.

RedoView
Reverse the last UndoView.