Copyright Goodheart-Willcox Co., Inc. Chapter 14 Model Documentation, Analysis, and File Exchange 349 In Figure 14-6, a multiview drawing layout is created by placing three projected views after placing the base view. The projected views include two orthographic views and an isometric view. Notice that wireframe styles are used for the orthographic views and a shaded style is used for the isometric view. Drawing views can be edited after placing them to change properties as needed. In addition, as previously discussed, drawing views update when changes are made to the model. This is discussed in more detail in the next section. PROFESSIONAL TIP PROFESSIONAL TIP You can create more than one base view in a layout. Additional base views can be used to create assembly or subassembly drawings. Updating Drawing Views Drawing views maintain an associative relationship with the model from which they are created. However, it is important to note that this associative relationship is controlled by the model, not the drawing view. When making design changes, you make changes to the model geometry, not the drawing view. During the design process, it is often necessary to make modifi cations. If you have created drawing views from a model, and then make modifi cations to the model, the derived base view and any views projected from the base view are updated auto- matically by default. This behavior is controlled by the VIEWUPDATEAUTO system variable. When this system variable is set to 1 (on), drawing views automatically update when you open a drawing fi le or activate a layout with drawing views. The Shaded with Visible Lines Visible Lines Visible and Hidden Lines Figure 14-6. A multiview drawing layout consisting of front, top, right-side, and isometric views. The top view of the model is used as the front view (base view) in the drawing. Notice the different display style options that are used.