Context-sensitive help is available for all of the
  items on the pull-down and pop-up menus, as well as all
  window objects.

  To get help, position the pointer to a menu item and
  press the HELP key.  Help information appears in a
  window and can remain in view while you continue to use
  SCA.

  Alternately, choose "on Context" from the help menu.  The
  cursor will change to an inverted question mark.  Position the
  the cursor on the item for which you want help and click on MB1.