If you are new to BobCAD and you are not sure about the work flow, this video should help.

I walk though a simple 2D part from start to finish. Covering topics like, drawing with rectangle, parallel lines, arc snap, and 3 entity arcs. Trimming and deleting.... Stock wizard, changing starting stock size from, and zero location. Editing drilling cycles to call a single tool to drill a hole, changing start position and cut direction for profiles. I also show simulation, changing post order and posting a program. It's a short 10min video, and covers a lot so if you have any questions or need more detail please let me know.

[ame=http://www.youtube.com/watch?v=LlTtRp9vUiY]Simple 2D Part - YouTube[/ame]