Stitch Length Settings; Stitch Finger Lever Setting - Singer S14-78 Mode D'emploi

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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