Using Bookreader
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  Modifying the Library Window Display (OpenVMS)

  During installation, Bookreader defines the logical name
  DECW$BOOK to search in SYS$COMMON for the following
  files:

      LIBRARY.DECW$BOOKSHELF
      LIBRARY.DECW_BOOKSHELF

      LIBRARY.BKS

  If Bookreader locates one of these files, it displays the books
  and bookshelves listed in the file.  The system manager can
  redefine DECW$BOOK to point to a different directory that
  contains a LIBRARY.DECW$BOOKSHELF file.  For example:

  $  DEFINE  DECW$BOOK  DISK1:[BOOKDIR]

  Often, the system manager defines DECW$BOOK to be a
  search list.  For example:

  $  DEFINE  DECW$BOOK  DISK1:[BOOKDIR],  DISK2:[LOCAL_BOOKS],-
  _$  SYS$COMMON[DECW$BOOK]

  When DECW$BOOK is defined as a search list, Bookreader
  displays the contents of each library file it finds in the di-
  rectories listed in the search path, in the order in which the
  directories are listed in the definition.  Bookreader opens and
  displays the contents of the first bookshelf it encounters.

  For example, assume DECW$BOOK points to the follow-
  ing two directories:  SYS$COMMON:[DECW$BOOK] and
  DISK2:[LOCAL_BOOKS].  When you start Bookreader, the
  following things occur:

  1.   First Bookreader looks in the directory SYS$COMMON:[DECW$BOOK]
      for library files named LIBRARY.DECW$BOOKSHELF,

      LIBRARY.DECW_BOOKSHELF, and LIBRARY.BKS.
      If Bookreader finds a file, it displays the contents in the
      Library window.

  2.   Then Bookreader looks in the directory DISK2:[LOCAL_BOOKS]

      for a LIBRARY.DECW$BOOKSHELF library file.  If
      Bookreader finds a file, it displays the contents in the
      Library window after the contents of the first library file
      it found.

  To see how DECW$BOOK is currently defined on the system,
  enter the following command:

  $  SHOW  LOGICAL  DECW$BOOK

  Once you decide to modify the Library window display, you
  can choose one of the following approaches:

  *   Display an alternate library bookshelf instead of
      the default

  *   Add another bookshelf to the default library book-
      shelf

  Both tasks require that you first  create your own book-

  shelf file.
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