 Command entry:
Command entry:Activate an orthographic viewport. 

 Viewport navigation controls 
 
 
 (Zoom Region)
            
 Command entry:
Command entry:Activate a Perspective viewport. 

 Viewport navigation controls 
 
 
 (Zoom Region on the Field of View flyout)
            
 Command entry:
Command entry:Keyboard 
 Ctrl+W
 Ctrl+W Zoom Region magnifies a rectangular area you drag within a viewport. This control is available only when the active viewport
            is an orthographic, Perspective or User-Axonometric view. It is not available for Camera viewports. 
         
         Zoom Region stays active until you right-click or select another command. 
         
          
            Procedures
            
 
            To zoom a region:
            
            
               - Activate an orthographic or perspective viewport. 
- Click  (Zoom Region) or press Ctrl+W. (Zoom Region) or press Ctrl+W.When you zoom a region in a perspective viewport, select Zoom Region from the Field of View flyout. 
                   
- Drag a rectangular region in any viewport displaying a non-camera view. 
                  When you release, the region is magnified to fill the viewport. 
                   NoteWhen using the Zoom Region in Perspective view, the zoom rectangle is at a fixed distance from the camera. For this reason,
                        if you draw the rectangle large enough, you can zoom out from the scene.