Derive Sketch Elements 
            Sketch > Derive
Use the Derive functions to take over existing elements in a drawing into an active sketch.
                             
                         | 
                        
                             Offset 
  | 
                    
                             
                         | 
                        
                             TakeO...  | 
                    
Click 
 to open a pull-down menu with further functions. 
                
            
                        
                        