They take a walk break, but Steffen still has them work on the quality and tempo of the walk before returning to the canter.  He has them ride the centerline in the canter to teach her when the rider straightens her she is not asking for a change. By being accurate on the turn to the centerline she avoids having to leg yield back to the centerline and the chance shell get the change in the process of trying to be straight. They do a much better canter walk transition and Steffen still has her pay attention to the walk in the walk break.