Toyota SL1 Serie Mode D'emploi page 78

Page 57
Adjustments For The Differential Feed
Differential feeding performs the function of stretching or
condensing the edge of the fabric, since two independent feed
dogs, one in front and one behind the needles, can be adjusted
to feed at different ratio.
The function has the effect of producing a neat finish of
overedging for stretchable and condensable fabrics.
❈ "N" indicates the neutral position.
Refer to the below chart and test stitch performance on a scrap of material you are going to use.
Section
3
English
Indicator
Differential
feed deal