Baby Lock Anna (BL20A) Instruction and Reference Guide - Manual (Page 34)

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“+” “–”
Adjusting stretch stitch balance
If the stretch stitch patterns are uneven when you
sew on a particular fabric, correct them by turning
the stitch length dial.
If the patterns are drawn out, correct them by
setting the dial to the “–” side.
If the patterns are compressed, correct them by
setting the dial to the “+” side.