A "back march" may be used when the band wishes to move in the opposite direction from where it is projecting its sound. There are several ways to back march, one of which is to walk backward, putting each foot down and rolling from the toe to the heel (the exact reverse of the roll step). Another variation involves marching on the platforms of the feet, dragging the toe of the moving foot on the ground. Backward marching usually employs the same preference for leg straightness as forward marching (if the band marches with legs completely straight while marching forwards, they also do so while marching backward, to preserve uniformity of style). Using peripheral vision to align oneself to formations or field markings is even more important during backward marching.