SINGER 14T968DC - Manual (Page 46)

Align one piece of medium weight fabric so
that the knife just slightly trims the fabric edge.
Sew.
Align a second piece of medium wieght fabric so
that the knife just slightly trims the fabric edge.
Sew.
Place the two fabrics, right sides together.
Using a conventional sewing machine, sew a
straight stitch with a ⅝ inch seam.
Press the seam open.
Two-Thread Overedge (wide) page 5