You can enable a viewport
            navigator in any module that supports multiple viewports. The navigator
            displays an overlay of the viewport's area of interest. You can
            adjust the area of interest gesturally as an alternative to zooming
            and panning the view.
         
         To use the viewport navigator:
         
         
            - In a module that supports multiple views,
               click View.
            
- With a viewport selected, select Display.
               The viewport navigator
                  appears in the selected viewport. A grey outline indicates the current
                  area of interest.
                
- To adjust the area of interest:
               
                  - Drag over the area of interest to move
                     it. For
                        example, to view schematic nodes that appear to the right of the
                        viewport, drag the area of interest right in the viewport navigator.
- Ctrl-drag
                     a new box to change the area of interest.
                  
 
- You can also Alt-drag
               the viewport navigator to move it.