Article Hiding
--------------

   Or rather, hiding certain things in each article.  There usually is
much too much cruft in most articles.

`W W a'
     Do maximum hiding on the summary buffer (`gnus-article-hide').

`W W h'
     Hide headers (`gnus-article-hide-headers').  *Note Hiding
     Headers::.

`W W b'
     Hide headers that aren't particularly interesting
     (`gnus-article-hide-boring-headers').  See Hiding Headers.

`W W s'
     Hide signature (`gnus-article-hide-signature').

`W W p'
     Hide PGP signatures (`gnus-article-hide-pgp').

`W W c'
     Hide citation (`gnus-article-hide-citation').  Some variables for
     customizing the hiding:

    `gnus-cite-hide-percentage'
          If the cited text is of a bigger percentage than this
          variable (default 50), hide the cited text.

    `gnus-cite-hide-absolute'
          The cited text must be have at least this length (default 10)
          before it is hidden.

    `gnus-cited-text-button-line-format'
          Gnus adds buttons show where the cited text has been hidden,
          and to allow toggle hiding the text.  The format of the
          variable is specified by this format-like variable.  These
          specs are legal:

         `b'
               Start point of the hidden text.

         `e'
               End point of the hidden text.

         `l'
               Length of the hidden text.

    `gnus-cited-lines-visible'
          The number of lines at the beginning of the cited text to
          leave shown.

`W W C'
     Hide cited text in articles that aren't roots
     (`gnus-article-hide-citation-in-followups').  This isn't very
     useful as an interactive command, but might be a handy function to
     stick in `gnus-article-display-hook' (*note Customizing
     Articles::.).

   All these "hiding" commands are toggles, but if you give a negative
prefix to these commands, they will show what they have previously
hidden.  If you give a positive prefix, they will always hide.

   Also see Article Highlighting. for further variables for
citation customization.

   `gnus-signature-limit' provides a limit to what is considered a
signature.  If it is a number, no signature may not be longer (in
characters) than that number.  If it is a function, the function will be
called without any parameters, and if it returns `nil', there is no
signature in the buffer.  If it is a string, it will be used as a
regexp.  If it matches, the text in question is not a signature.