CAD Software Guide
eMachineShop CAD is free part design software connected to a real machine shop — you can design, analyze, price and even order custom parts in just minutes.
To navigate the help system to find a specific section, click on any of the buttons above or use the Question Mark Navigation tool in the upper right hand side of of the page.
And carefully follow the tutorial in the CAD software at top menu Help | Drawing Tutorial.
For more tips see the Forum.