SINGER W431 - Manual (Page 38)

OVERLOOK APPLICATION
(A)
(B)
Rick-Rack and Pine-Leaf stretch stitches are also
very usable for overlook stitching on both woven
and knit fabrics.
(Aj Place the raw edge of the fabric under the
presser foot so that as the needle swings to
the right, it comes down at the raw edge.
This will result in an enclosed seam
allowance.
(B) The seam allowances may be trimmed to 1/4
inch either before or after sewing. If
trimming before sewing, proceed as above.
Otherwise, sew the seam with the raw edge
of the fabric on the etched guide line 1/2".
(Any time you use the full width of a
particular stitch, you should readjust the raw
edge of the fabric 1/8 inch to the left.)
Afterward, trim the excess fabric near the
stitching. This method is actually easier than
the overedge method for fabrics that curl.
Note: On soft, loose knits, the fabric may
seem to wave or ripple. If this occurs, reduce
the pressure on fabric.