To dismiss all views and close the optional view window, do one of the
  following:

   -  Choose the Views...  menu item from the Options menu on the main or
      optional view window.  When the Views dialog box appears, clear all
      the toggle buttons within the dialog box, and click on OK.

   -  Choose the Close menu item from the File menu on the optional view
      window to close the optional view window.

   -  Choose the Close menu item from the File menu on the instruction
      window to close the instruction window.