Use the User Settings window to customize the way you work with Showcase. Many of the controls found here are also available
            from the Showcase  menu or elsewhere in Showcase. 
         
-  Default Unit Settings 
- 
               These work the same as described in  Adjust scene settings. Changes made in the Scene Settings window override settings in the User Settings window for the current scene.
                
-  UI Settings 
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-  Locator Grips 
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               Use these controls to show or hide accent light, decal, and cross-section grips as needed. These controls are also found in
                  the Options menu. Changes made here are reflected in the Options menu, and vice versa, and they are global; in other words,
                  they remain in place until you change them again, even if you open a different scene.
                
-  Selection Style 
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               This controls how a selected object is highlighted. Like the Locator Grips, changes to this setting are reflected in the Options
                  menu and are global. See  Select objects.
                
-  Heads-up Display 
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               The heads-up display provides you with instructions and information to help you use Showcase. Changes to these settings are
                  reflected in the Options menu and are global.
                
-  Background Color 
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               Sets the color to use behind the scene environment.
                
-  Walk Zone 
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