info about the Thumbnail Managing Standard option.
controlled by this variable. \"Use tumme dir\" means that the
thumbnails are stored in a central directory. \"Per directory\"
means that each thumbnail is stored in a subdirectory called
-\".tumme\" in the same directory where the image file is."
+\".tumme\" in the same directory where the image file is.
+\"Thumbnail Managing Standard\" means that the thumbnails are
+stored and generated according to the Thumbnail Managing
+Standard."
:type '(choice :tag "How to store thumbnail files"
(const :tag "Thumbnail Managing Standard" standard)
(const :tag "Use tumme-dir" use-tumme-dir)