Copyright Goodheart-Willcox Co., Inc. Chapter 3 Viewing and Displaying Three-Dimensional Models 61 check box is checked by default. Uncheck this check box if you want the view to rotate freely without snapping to a preset standard view as you drag the view cube. When Clicking on the View Cube Options in the When clicking on the View Cube area control how the fi nal view is displayed and how the labels on the view cube can be related to the UCS. There are three options in this area. Zoom to Extents After View Change. If the Zoom to extents after view change check box is checked, the model is zoomed to the extents of the drawing whenever the view cube is used to change the view. Uncheck this if you want to use the view cube to change the display without fi tting the model to the current viewport. Use View Transitions When Switching Views. The default transition from one view to the next is a smooth rotation of the view. Although this transition may look nice, if you are working on a large model it may require more time and computer resources than you are willing to use. Therefore, if you are switching views a lot using the view cube, it may be more effi cient to uncheck the Use view transitions when switching views check box. When this is unchecked, a view change just cuts to the new view without a smooth transition. This option does not affect the view when dragging the view cube or its compass. Orient View Cube to Current UCS. As you have seen, the view cube is aligned to the current UCS by default. In other words, the top face of the cube is always perpen- dicular to the Z axis of the UCS. However, this can be turned off by unchecking the Orient View Cube to current UCS check box. The NAVVCUBEORIENT system variable controls this setting. When unchecked, the faces of the view cube are not reoriented when the UCS is changed. It may be easier to visualize view changes if the view cube faces are oriented to the current UCS. When the Orient View Cube to current UCS check box is unchecked, WCS is displayed above the UCS shortcut menu in the view cube (unless the WCS is current). See Figure 3-13. This is a reminder that the labels on the view cube relate to the WCS and not to the current UCS. Additional Options Three additional options are available near the bottom of the View Cube Settings dialog box. These options are located below the When clicking on the View Cube area. Keep Scene Upright. If the Keep scene upright check box is checked, the view of the model cannot be turned upside down when selecting a face, edge, or corner of the view cube. When unchecked, the view may be rotated so it is upside down. This can be confusing, so it is best to leave this box checked. Show Compass below the View Cube. The compass is displayed by default in the view cube. However, if you do not fi nd the compass useful, you can turn it off. To hide the compass, uncheck the Show compass below the View Cube check box. Indicates the view cube faces are based on the WCS Figure 3-13. When the Orient View Cube to current UCS option is off in the View Cube Settings dialog box, the UCS shortcut menu has WCS displayed above it.