My pattern says,"...Afterthought Heel Placement: Using a piece of
waste yarn, knit the next 34 stitches . Slip these
stitches back onto left side of needle and
resume knitting in stockinette stitch with MC."
Usually, I would place 34 stitches on waste yarn and continue knitting down the row after those stitches. What is this pattern asking me to do? Thank you.