The Parents and Children dialog box appears.
       You can see that Extrude.1 and Plane.1 are parents of the split 
           surface, whose child is the translated surface (Translate.1):
       
         
           
            
         
         
           If the insert mode has not been activated, the splitting operation 
           would have been recorded in the tree, at the end of the 
           currently active geometrical set, and the translated surface would 
           not have been split:
         
         
           
 
         
         
           
           