I want to know which CAD tools you use. How steep is the learning curve? Did you take a course? Or do you have assistance from a professional? What's the cost?
I learned Euclidean geometry by use of compass and ruler. It would be nice to be able to illustrate my ideas in this forum and elsewhere. Often a drawing says more than words. So, please help me get my ideas across. I am thinking of the illustrations by Kevin Kelly, Addie, David Beard, F. Denis etc. How do you do it?