 Command entry:
Command entry:Activate a Perspective or orthographic viewport. 

 Viewport Navigation controls 

 Zoom Extents flyout
            
 The Zoom Extents flyout displays the Zoom Extents button and the Zoom Extents Selected button. 
           Zoom Extents centers all visible objects in an active Perspective or orthographic viewport. This control is useful when you want to see
            every object in a scene in a single viewport.
 Zoom Extents centers all visible objects in an active Perspective or orthographic viewport. This control is useful when you want to see
            every object in a scene in a single viewport. 
         
           Zoom Extents Selected centers a selected object, or set of objects, in an active Perspective and orthographic viewport. This control is useful
            when you want to navigate to small objects lost in a complex scene.
 Zoom Extents Selected centers a selected object, or set of objects, in an active Perspective and orthographic viewport. This control is useful
            when you want to navigate to small objects lost in a complex scene. 
         
         
            
            Procedures
            
            
            To zoom all objects in one viewport:
            
            
               - Activate the Perspective or orthographic viewport you want to zoom. 
- Click  )Zoom Extents). )Zoom Extents).The viewport displays all objects in the scene. 
                   
To zoom on a specific object:
            
            
               - Activate the perspective or orthographic viewport you want to zoom. 
-   Select the object by clicking it, or press H to select it by name. Select the object by clicking it, or press H to select it by name.
- Click  (Zoom Extents Selected). (Zoom Extents Selected).The viewport displays the selected object. 
                   
To exclude an object from Zoom Extents:
            
            Use this procedure, for example, to ignore lights that are far away from the other objects in the scene. 
            
            
               -   Click an object to select it. Click an object to select it.
- Right-click the object and choose Properties. 
- In the Display Properties group, make sure properties are set to By Object. 
- Turn on Ignore Extents. 
                  The object will now be excluded by Zoom Extents and Zoom Extents Selected. 
                   
 
         
            
            Interface
            
            -   Zoom Extents Selected Zoom Extents Selected
- 
                  
                     
                     Centers and magnifies views so just the selected objects or sub-object selections in the scene are shown in a single viewport.
                        If no objects are selected, the effect is the same as Zoom Extents. 
                      
 
-   Zoom Extents Zoom Extents
- 
                  
                     
                     Centers and magnifies views so all the visible objects in the scene are shown in a single viewport. 
                      Objects can be excluded from zoom extents all if the Ignore Extents box is turned on under Object Properties.