If you are talking about marking the quilt lines, I eye it, if it's just the 1/4 line. I used to use the thin tape but occasionally I'd stick my needle through it and it gummed up the needle. If I'm using a stencil I usually do that before I basted the layers together because it will lay flatter and is easier to mark that way. I always use the markers that disappear with water for lighter fabrics or the white pencils for darker fabrics. Pencil lines don't go away. Hope this helped.