Undo/Redo
The undo/redo toolbar is shown below:

| 
   Undo icon  | 
  
  
   Clicking this icon undoes the most recent action. Hover the mouse over the icon to obtain a description of the action to be undone.  | 
  
 
| 
   Undo dropdown  | 
  
  
   Shows a list of all available undoable actions. This supports undoing all actions to a selected point.  | 
  
 
| 
   Redo icon  | 
  
  
   Clicking this icon redoes the most recent action. Hover the mouse over the icon to obtain a description of the action to be redone.  | 
  
 
| 
   Redo dropdown  | 
  
  
   Shows a list of
  all available redoable actions. This supports redoing all actions to a
  selected point.  |