Pfaff SMART 200C Owner's Manual page 42

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6. Buttonholes are sewn from the front of the
presser foot to the back, as shown.
7. Raise the presser foot and cut thread.
To sew over same buttonhole, raise
the presser foot (will return to original
position).
After sewing the buttonhole stitch, push
the buttonhole lever up until it stops.
8. Cut the center of the buttonhole being
careful not to cut any stitches on either
side. Use a pin as a stopper at the bartack
so you do not cut too much.