There is a notch on my presser foot and, when placed on the drawn corner-to-corner line, I get a "scant" 1/4" seam. As suggested, just turn your fabric and sew on other side of line. Also, if you want to go to the expense, you can purchase "paper-type" strips that have the solid line marking with the 1/4" marking down both sides which makes for perfect stitching. The paper is then torn away. Saw it at a quilt show yesterday. Going back today and I will try to get the name of the product.