SINGER W761 - Manual (Page 7)

How to Use Selective Knob (Dial)
Fig. 8
Turn hand wheel until needle is out of material.
The selective knob should not be moved at any time
with the needle in the material, which would result
in bent or broken needles. Having inserted a designer
disc in the machine, turn selective knob so that the
red dot is next to "A". Your machine will now sew
the design of the disc, automatically.
By returning the selective knob so that the red dot is
now at "M" the machine will now do regular straight
stitching, without the necessity of removing the disc
first. When sewing, the red dot should always be at
either the "A" or "M" point, never in between.
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