<p>A navigation system for navigating a three-dimensional (3D) scene that includes a model or object with which a user can interact. The system accommodates and helps both novice and advanced users. To do this, the system provides a focus point that can be positioned on a model surface and with respect to which the tools of the system operate. The point is a geometry sphere that can have axial rings that show the orientation of the scene and the relative position of the view in the scene based on sphere size.</p>
