Imagine shrinking into a tiny person and jumping into your computer to check out (or show off) your 3D models. That's basically what SketchUp's walkthrough tools enable you to do. But instead of altering your entire body composition, you just click a few tools - namely the Position Camera, Look Around, and Walk tools. Tip: Remember that SketchUp uses the metaphor of a camera to change how you see your model. Here's how each tool enables you to tour your model: