I just found this out….You can draw straight lines easier if you put a small drop of moisturiser on the rubber tips of your stylus. You would need to be able to glide your stylus across your tablet for cleaner and thinner lines. If you glide slowly, the line will be a tad coarser. I am referring to the lettering pen btw. It worked nicely on my cheapo stylus… Please don’t hold me liable if it doesn’t work with your stylus ;p