Off topic, but you could have done your notes in LaTeX as well. In fact, in my experience, using TeX for math formulas (I did a semester's worth of calculus notes in LaTeX) is actually
faster than writing them out by hand (\unless I give up on trying to make the result readable at all, and maybe even then.
Admittedly, graphs and illustrations were an issue. In fact, I basically didn't bother with either. But just for text and math notation, LaTeX was awesome.
