Save As...
  The Save As...  menu item lets you name your file and save
  the changes you made to it.
  To save all changes to a new card file:
  1.  Choose Save As...  from the File menu.  A dialog box
      appears.
  2.  Type the name of the card file in the Selection entry
      box, using the file extension CARD. For example,
      SCHOOLS.CARD.
  3.  Click on OK.
  Additional topics:
  *   Menus in the Cardfile Window
  *   Menus in the Card Window
  *   Overview of Cardfiler