AutoCAD is a very powerful 2D drafting application, but behind the user interface (toolbars, pull-down menus, and drawing window) lie the capabilities of navigating and creating 3D models and generating presentation-quality images from 3D models to share with your clients. Before you begin navigating or creating your own 3D models from 3D solids or surfaces or using materials and user-defined lights to generate a photoreal- istic rendering of a 3D model, you must become familiar with how AutoCAD’s user interface works in 3D. To be proficient in 3D, you must understand all the different user interface elements that are available in AutoCAD. When you understand the elements of the user interface, you can explore some of the basics of working with drawing files and how to make sure the 3D tools and commands that you want to use are accessible by customizing the layout of AutoCAD’s user interface.