How do 'Reverse Sewing' and 'Backstepping' differ exactly?

'Reverse sewing' - continuously - is activated by the 'Stitch Altering Area' on the screen.'Backstepping' is activated by pressing the 'Quick Reverse/Backstepping button' on the head frame or by the 'Stitch Altering Area' on the screen. 'Backstepping' means that decorative designs can be stitched in reverse sequence (or 'undone') up to 200 stitches.Refer to 'Overview/Function buttons' and 'Customizing Stitch Patterns' chapters in the user manual.