SINGER 14T967DC-WORKBOOK QUANTUMLOCK - Manual (Page 41)

Join two pieces of medium weight fabric,
right sides together with a conventional sewing
machine straight stitch.
Finsh the edges of both fabric pieces by
aligning the fabric edge so that the knife just
slightly trims the fabric edge.
Sew.
Press seam allowance to one side.
Two-Thread Overedge (narrow) page 10