Pfaff creative 2170 Owner's Manual page 90

Asymmetric taper, Stitch no. 22
C To make an asymmetric taper chose a stitch that has a needle position
to the right or left, for instance stitch no. 22. If you use the mirror
function you can reverse the needle position. This stitch is most suitable
for corners and border stipes. For asymmetrical tapering three angles
are available: 90°, 45° and 30°. Select stitch no. 22 and proceed as
described above.
Use the Mirror side to side (C) to reverse the needle position.
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