Bernette London 7 Instruction Manual page 44

* Buttonholes are sewn from the front of the presser foot to the back, as shown.
Basic Sewing Procedures
Position the fabric under the presser foot so
that the centerline's mark is aligning with the
center of the buttonhole foot.
Lower the buttonhole lever.
While lightly holding the end of upper thread
and start sewing.
Please Note:
Gently feed the fabric by hand.
Before stopping, the machine will automatically
sew a reinforcement stitch after the buttonhole
is sewn.
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