+By default, \cw{nntpid} will try to display the article using a
+pager (\cw{more}(1), unless you have specified an alternative in the
+environment variable \cw{PAGER}). This is partly for convenience,
+and partly a mild security measure: it gives you some protection
+against the news article potentially containing control sequences
+that cause unexpected behaviour in your terminal. If \cw{nntpid}
+detects that its standard output is not a terminal, however, it will
+bypass the pager and just write out the article directly.
+
+There is a third mode of operation, enabled by the \cw{-a} option,
+in which \cw{nntpid} retrieves \e{all} available articles in the
+group and writes them to standard output in \cw{mbox} format.
+
+The location of the news server is obtained by reading the
+environment variable \cw{NNTPSERVER}, or failing that the file
+\cw{/etc/nntpserver}.
+