When I am making a muslin (one that I am not planning to wear and only on woven material) I mark dart and other markings using the eyelet punch that came with my machine. It makes a tiny hole through the paper and both layers of fabric which is easy to see on wovens (esp muslin!) and you can match up exactly with a pin or holding to the light. It leaves a hole in the pattern to later pen-mark or tack through. Anything to save those extra seconds!!