I use a thin permanent sharpie marker to mark my design on Miracle Film by Marathon. Let it dry overnight or cheat a bit by drying it well with a hair dryer on low heat. (If you don't dry the sharpie well the ink can be transferred to your quilt by the needle going through the sharpie ink.) Miracle Film is a heat away stabilizer so high heat on the hair dryer would not be good to dry it, I'm sure. After stitching through it, it tears away so easily (it's perforated all over) I have never had to use an iron to remove it.