Chapter 1 Introduction to Three-Dimensional Modeling 13 Copyright Goodheart-Willcox Co., Inc. NOTE NOTE When the visual style is 2D Wireframe, you can quickly view the model with hidden lines removed by typing HIDE. The HIDE command can be used at any time to remove hidden lines from a wireframe display. If HIDE is used when any other visual style is current, the Hidden visual style is set current. Conceptual 2D Wireframe Hidden Shaded Realistic Shaded with Edges Sketchy X-Ray Shades of Gray Wireframe Figure 1-14. The default AutoCAD visual styles.