Hi everyone. I'm a mechanical engineer and have spent a fair amount of time generating black and white line drawings to go in papers, documents, etc. What is your favorite software to create drawings like you might see in textbook homework problems? A couple of simple examples given below. I typically will hash something out in microsoft powerpoint or publisher, but have pretty much reached the limit of those applications. In high school and early undergrad I became quite proficient in using AutoCAD to do line drawings, which is, after all, what it is designed for, but its been some time since I've used it. Ideally, I want something that combines the ability to do geometric constraints, snap, and other capabilities like trim or extend with a fairly simple UI like you might find in a microsoft application. Your thoughts?