Copyright Goodheart-Willcox Co., Inc. Chapter 5 Using Model Space Viewports 127 Using the UCS icon grips, as discussed in Chapter 4, create a new UCS on the angled face in the right-hand viewport. You can move the UCS icon dynamically using the origin grip, or you can use the 3 Point option of the UCS command. If you are using the 3 Point option, use the pick points shown in Figure 5-14. To quickly access the 3 Point option, right-click on the UCS icon and select 3 Point from the UCS icon shortcut menu. Notice in your drawing that after making the right-hand viewport active, the view in the upper-left viewport automatically changes to a plan view of the new current UCS. The view changes again after creating the new UCS on the angled face in the right-hand viewport. With the right-hand viewport current, turn on 3D object snap. Turn off the dynamic UCS function, if it is on. Then, enter the CYLINDER command. When locating the center of the cylinder base, use the Center of face 3D object snap and select the center of the angled face. Next, enter a diameter of 1.5 units and a height of .35 units. The object is now complete, Figure 5-15. Notice how the viewports have different UCSs. Each viewport can have its own UCS. The view in the upper-left viewport is the plan view of the current UCS. This is because of the UCSFOLLOW system vari- able setting of 1 in the upper-left viewport. In addition, the UCS orientation in the upper-left viewport is the same as the orientation in the right-hand viewport. The UCS orientation in one viewport is not affected by a change to the UCS in another viewport unless the UCSVP system variable is set to 0 in a viewport. If a viewport arrangement is saved with several different UCS confi gurations, then every named UCS remains intact and is displayed when the viewport confi guration is restored. To see the effect of the UCSVP system variable in the upper-left viewport, make that viewport current after completing the model in the right-hand viewport. The resulting display is shown in Figure 5-15. Next, make the lower-left viewport current, and then make the upper-left viewport current again. Now, notice that the front view is displayed in the upper-left viewport, and the UCS orientation is the same as the orientation in the lower-left viewport. Plan view Figure 5-15. The cylinder is drawn to complete the object. Notice the plan view in the upper-left viewport. Activate the upper-left viewport after completing the model in the lower-right viewport to view the UCS icon orientation as shown.