Then you work in reverse stockinette, making short rows to give the center section more length. See how the armhole edge tapers down toward the underarm.
When you've worked all the short rows and picked up all the wraps (knit wise and purl wise), she has you use a crochet hook to bring the live stitches from the right side to the back side where you slip them onto a smaller needle and finally bind them all off.
Here's a shot from the inside. Very nice and clean inside - and for those of you who hate finishing, there's no sewing.
Honestly, I think it might have been easier to pick up from the right side, work the short rows , bind off and then whip stitch the bind off to the pick-up ridge. But hey, I'm one of those weird knitters who likes finishing. I am anxious to wear this.