Continuing with the Drawing
When you are ready to continue with your drawing:
• Click Compare and then, in the Continue group, click 
Original or 
Revised.
Original or Revised.Creo Elements/Direct Drafting displays the selected drawing and deletes the other drawing. You can now continue working on this drawing in the usual manner.
Unlike the Show group buttons, the Continue group buttons do not let you toggle between the two drawings as it deletes the one you do not select.