Have you ever needed to gather something but didn't want to use the old standard straight stitch technique.
The first time I used this technique I was amazed how easy it was.
I used this technique when I made my dust ruffle.
This method is great for gathering large pieces, or heavy fabrics. You will need heavy thread, or kite string.
A- Set your zig zag stitch to its widest, and longest setting
B- Put your fabric under the presser foot set to sew at 1/2".
C- Set your thread on the fabric so that it will be in the center of the zig zag stitch.
D- Begin stitching over the thread. Make sure you don't sew through the thread.
E- When you are ready, pull the strings to gather the fabric easily.
Tutorial source was found here