Stitch Length Settings; Stitch Finger Lever Setting - Singer S14-77 Instruction Manual

Stitch Length Settings

The stitch length dial should be set to "3" for most sewing.
Adjust the stitch length to 4mm when sewing on heavy weight
fabrics. Adjust the stitch length to 2mm when sewing on light
weight fabrics.

Stitch Finger Lever Setting

The stitch finger lever should be set to "N" (Normal) for all
standard overlock sewing. To sew rolled edge you need to
retract the stitch finger by setting the stitch finger lever to "R"
(Rolled Edge). When moving the stitch finger, be sure to push
the lever as far as it will go in each direction.
14 – Getting Ready to Sew
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