+use `(setq message-hidden-headers nil)'. *Note Message Headers:
+(message)Message Headers.
+
+** You can highlight different levels of citations like in the article
+buffer. See `gnus-message-highlight-citation'.
+
+** `auto-fill-mode' is enabled by default in Message mode. See
+`message-fill-column'. *Note Message Headers: (message)Various Message
+Variables.
+
+** You can now store signature files in a special directory named
+`message-signature-directory'.
+
+** The option `message-citation-line-format' controls the format of the
+"Whomever writes:" line. You need to set
+`message-citation-line-function' to
+`message-insert-formatted-citation-line' as well.