Copyright Goodheart-Willcox Co., Inc. 92 AutoCAD and Its Applications—Advanced Next, use the PLINE command to draw the outline of the side view. Refer to the coordi- nates shown in Figure 4-17. When entering coordinates, you may want to turn off dynamic input. As an alternative, type a pound sign (#) before each coordinate with dynamic input turned on. This temporarily overrides the dynamic input of relative coordinates, which is controlled by the DYNPICOORDS system variable. The PLINE command is used instead of the LINE command for this model because a closed polyline can be extruded into a solid. Be sure to use the Close option to draw the fi nal segment. A wireframe of one side of the object is created. Notice the orientation of the UCS icon. Now, the EXTRUDE command is used to create the base as a solid. This command is covered in detail in Chapter 6. Make sure the same UCS used to create the wireframe side is current. Then, select the EXTRUDE command by picking the Extrude button on the Modeling panel of the Home tab in the ribbon. When prompted to select objects, pick the polyline and then press [Enter]. Next, move the mouse so the preview extends to the right and enter an extrusion height of 4. If dynamic input is off, you must enter –4. The base is created as a solid. See Figure 4-18. You may want to switch to a parallel projection, as shown in the fi gure. Saving a Named UCS Once you have created a new UCS that may be used again, it is best to save it for future use. For example, you just created a UCS used to draw the wireframe of one side 0,5 2,5 5,2 5,0 Figure 4-17. A wireframe of one side of the base is created. Notice the orientation of the UCS. Figure 4-18. The wireframe is extruded to create the base as a solid.