What features on the Hill-Rom® Procedural Stretcher allow for easy raising and lowering of the head section?

What features on the Hill-Rom® Procedural Stretcher allow for easy raising and lowering of the head section?
 

With BackSaver Fowler® feature, let the patient's own weight help raise and lower the head, taking the load off your back. The Auto Contour mechanism also includes the BackSaver Fowler® feature to help take the burden off your back.