This is stitch #4 on the Bernina 440 machine. I changed the width to 3.1 mm and the length to 2.5 mm. I also set my straight stitch to 0.4 mm long and used this stitch to stop and start .... and also to go around the corners.
Here is what the screen looks like for both settings.
For this quilt, I used the stitch 9 times side by side in one area of the quilt. At each corner, I used the tiny straight stitch. I stopped just short of the corner, switched stitches, turned the quilt, and took a few more stitches, then switched back to the serpentine stitch. I like the look that I get at the corners when I use the straight stitch and I feel like this secures the stitches. Here is a picture showing how close to the corner I sew before changing the stitch.
I hope you like this stitch and will try it out on your quilt!