| The Historical Graph dialog box appears. | 
         
         
           
             | 
         
         
           | In this case, you can examine the history of events 
           that led to the construction of the Multi-sections surface.1 element. 
           Each branch of the graph can be expanded or collapsed depending on 
           the level of detail required. | 
         
         
           | The following icon commands are available: | 
         
         
           
             | 
           Add Graph | 
           Adds a selected element to the graph | 
         
         
           
             | 
           Remove Graph | 
           Removes a selected element from the graph | 
         
         
           
             | 
           Reframe | 
           Centers the graph in the window | 
         
         
           
             | 
           Surface or Part graph representation | 
           Gives a horizontal or vertical representation | 
         
         
           
             | 
           Parameters | 
           Displays any parameters associated with the elements in the graph | 
         
         
           
             | 
           Constraints | 
           Displays any constraints associated with the elements in the 
           graph |