Multi-Stitch Zig-Zag; Bar Tack - Singer 3116 Simple Instruction Manual

Set machine as illustrated on left.
Set the stitch length dial to "1" - "1.5".
This function is used to secure the tops of kick pleats, as
well as pocket openings. First use a straight stitch across
the top of the pocket or pleat. This seam should be
approximately 1/4 to 1/2 of an inch long. Set stitch to
zigzag and stitch over the straight stitch backstitch at the
beginning and end of stitch to secure ends.