Well, the key step is to choose Parallel Projection instead of Perspective from the Camera menu, but further than that depends on where you want to go with it. Which particular view? Paper print out or something else?
RTCool thanks for replying. I would like to be able to produce a workshop drawing with Top Front and Side view arranged as an orthographic on the same page.
Set up each desired view and then save each view as a scene with scene palette. You then use Layout to create pages and place each scene on the page. You determine the scale in Layout for it to print at.