@item Changes in summary and article mode
@itemize @bullet
+
+@item Gnus now supports sticky article buffers. Those are article buffers
+that are not reused when you select another article. @xref{Sticky
+Articles}.
+
@item International host names (@acronym{IDNA}) can now be decoded
inside article bodies using @kbd{W i}
(@code{gnus-summary-idna-message}). This requires that GNU Libidn
See @code{message-fill-column}. @xref{Various Message Variables, ,
Message Headers, message, Message Manual}.
+@item You can now store signature files in a special directory
+named @code{message-signature-directory}.
+
+@item The option @code{message-citation-line-format} controls the format
+of the "Whomever writes:" line. You need to set
+@code{message-citation-line-function} to
+@code{message-insert-formated-citation-line} as well.
+
@end itemize
@item Changes in back ends
@item The nnml back end allows other compression programs beside @file{gzip}
for compressed message files. @xref{Mail Spool}.
+
+@item The nnml back end supports group compaction.
+
+This feature, accessible via the functions
+@code{gnus-group-compact-group} (@kbd{G z} in the group buffer) and
+@code{gnus-server-compact-server} (@kbd{z} in the server buffer)
+renumbers all articles in a group, starting from 1 and removing gaps.
+As a consequence, you get a correct total article count (until
+messages are deleted again).
@end itemize
@item Appearance