I have tried everything ever invented for marking (and then some!) I find I use different methods for different types of designs-chalk pencils and tamper (powdered chalk) I tend to use with stencils, but you have to mark as you go as the chalk wears off as you handle the quilt. I use dissappearing pens as well. If I want to mark a large area in advance, I use a pen that dissappears with a little water or steam. But you have to be careful and test that one first and don't leave it on for a really long time before removing (don't mark, put your quilt away for 6 months and then work on it). Lots of people here will have different ideas on what works for them. I just don't have any one type I use for every quilt. The Hera I use for straight lines, but you can't mark a large section and depending on the fabric print, it can be hard to see. Solids and subtle prints work better than busy prints.