That is definitely not a stupid question. We actually have several video's covering the topic. I'm assuming you are working with a fairly recent version of ZBrush so you might check out Lesson 19 of our Creative Development Course, Creature Concept Sculpting in ZBrush with Pat Imrie. While he covers many things in this lesson, he specifically begins to setup the turntable at about 5:30.
Also, if you are interested in more ways to present your work from ZBrush, you might check out the course Presentation Techniques in ZBrush 4.