18 AutoCAD and Its Applications—Advanced Copyright Goodheart-Willcox Co., Inc. pick all of the lines of the object. After pressing [Enter], you are prompted that a loop is extracted, a region is created, and, if constraints were applied, that they are removed. The appearance of the object will not change. Converting to a Solid The object is now a “region” that can be quickly converted to a solid. First change to the 3D Modeling workspace, and then use the viewport controls or the view cube to display the object from the southwest isometric viewpoint. Working with models is more intuitive when a 3D display is used. See Figure 1-20C. The region can be converted to a solid using either the EXTRUDE or PRESSPULL command. For example, pick the Extrude button in the Modeling panel on the Home tab of the ribbon and select the region. Using direct distance entry, enter a height of .55, as shown in Figure 1-21, and press [Enter]. EXTRUDE Ribbon Home Modeling Extrude Type EXTRUDE EXT B A C Figure 1-20. A—Half of the 2D object is drawn using geometric constraints. B—The object is mirrored to create a full profile of the connector body. C—The object is now a “region” and is displayed in the southwest isometric viewpoint. Enter the extrusion distance Select the command Figure 1-21. The object is extruded into a solid and displayed as a wireframe.