Water Soluble FINELINE Transfer Pen. Thick tip pens just don't quite cut it for detailed designs!
I pin my design to my weavers cloth or monks cloth and then using my phone light to illuminate the design.
Then I draw my image on the fabric. When I am done and if I have any lines showing, I take a cup of warm water and a soft paint brush and go over the lines I want removed.
Works like a charm!