Maximizing Windows
  If you are working with only one application, you might want
  to maximize the application window so that it is larger.  When
  you maximize a window, your other windows and icons
  stay on the screen, but they are covered by the maximized
  window.
  To maximize a window:
  1.  Point to the window's maximize button.
  2.  Click MB1.
      The window expands to its maximum allowable size.