Couching is simply sewing a heavy thread in place with a finer thread. It works beautifully by machine as well. I use a zigzag stitch to secure the heavy thread in place. And, if you have a cording foot— the foot guides the thread as you sew.
Sewing patterns for summer dress
How to sew kenarasho
Discover thousands of images about Simply sleeveless dress long pattern.
Sewing tutorials: Use of special sewing feet; I'd love to have one of these but I don't have a Janome.
++ Bulky seam trick - use a cardboard piece to help the foot.