Delete
  The Delete menu item in the Card menu lets you delete an
  index card.
  To delete an index card:
  1.  Display the card you want to delete.
  2.  Choose Delete.  The card window disappears from the
      screen and the topic disappears from the cardfile window.
  Additional topics:
  *   Menus in the Card Window
  *   Menus in the Cardfile Window
  *   Overview of Cardfiler