If the fabric is dark enough, I use white chalk applied lightly. It usually brushes off after quilting but a damp facecloth will take off any residue. I sharpen my chalk for a nice fine drawn line or through a stencil. I have posted my chalk with sharpener before but I will post again.
The trick for FMQ a drawn design is to use a marking method that is removable so you don't have to follow the design exactly. [ATTACH=CONFIG]513044[/ATTACH]