|I picked up this tip from the Threads forum. When working with slippery, slithery fabric such as rayon challis or silk georgette, wash and dry first, then saturate the fabric in a strong starch solution. I use liquid starch straight out of the bottle. Let dry. Then spritz or sprinkle with water, roll up and put into a plastic bag until uniformly just damp. (Actually, I can remember my mother doing this with pillowcases and shirts and the like when I was little, but she used cake starch.) Then press, being careful to align the grain correctly. This treatment makes the fabric much easier to lay out and cut. Release the stiffness by crumpling the fabric in your hands for sewing. You can get a weaker effect using heavy spray starch, but the saturation effect seems to work best. This is only for washable fabric, of course!