I have learned how to 'see' things as lines, shapes, angles and proportions. That's not my problem. My problem is, although I can see things as they are, I can't transfer them 100% accurately. In the half a second from me looking at the computer with the reference photo/object/reference photo, i forget the exact angle of the line. It's only marginal, but it makes a difference later on in the drawing. Once i've drawn my bit of the line, I look back to the object/photo, and see the problem, try to fix it, see the problem with that, try to fix it, etc. about four times. Is there a way to avoid this? It happens to almost every bit of every drawing I do, and It's rather annoying.