Hi Kathie, this is me, a two thread rolled hem stitch is preferred for fine, lightweight edge finishes on sheer and lightweight fabrics. Adjust your stitch length to 1.5 or 2 mm setting for soft edge finish. Okay, here's how you start: go with a balanced 2-thread overlock stitch before adjusting your tension. Tighten the needle thread tension dial to eliminate "V's" formed by your needle thread on the underneath side of the fabric. Loosen the looper thread tension dial so that the looper thread rolls around the edge to the upper side of your fabric. I can send you pics of samples so you can see what you need to do if "that" or "this" isn't quite right. Later...