EXTRAS/IFF-PAGES
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   This function saves all entries of the catalogue as IFF-Files.
   Depending on the catalogue's type 12 or 20 thumbnails per page (file)
   will be saved.
   A path requester appears which allows selection of the
   saving path for the single IFF-graphics. These will be named
   according to the following scheme:

            CATALOGNAMExxx.IFF  (xxx is the page number)


   After specifying the saving path a menu appears which
   allows saving parts of the catalogue as IFF-pages only, by giving
   start and end pages.


   Note: This function may overwrite already
         present graphics having the same name!


