I’m getting ready to drape some designs! The first step is to mark the form with twill tape. Twill tape is a thin black cotton ribbon that you pin to the dress form to delineate grain lines, seam lines, and style lines. This is the one I bought: I originally followed the Beatrice Forms video, where they have an industry expert guide you through, in detail, how to mark style lines on your custom dress form, and I learned a lot from it! (watch it