The default view is perpendicular to the 
plane from a positive 
coordinate. To change the view, you can make a selection from the
Views menu in the Graphical window
menu (Figure 7.11: The Graphical window Menu). The view
will change to the plane perpendicular to the axis you select from a positive
coordinate on that axis; repeatedly selecting an axis will cause the view to
alternate with the view from a negative coordinate. Note that you can also change
the view using the shortcut keys described in Table 7.1: Graphics Display Window Shortcut Keys.
