-[[!iki plugins/comments desc=comments]] plugin, and should be the only
-thing in a comment page. It is usually filled out by
-the comment plugin when a user posts a comment.
+[[!iki plugins/comments desc=comments]] plugin. There should
+be one comment directive in each source file with extension
+`._comment` or `._comment_pending`, and the directive should not
+appear anywhere else. Comments are normally created via the web,
+in which case ikiwiki automatically creates a suitable
+`._comment` file.
+
+Wiki administrators can also commit comment files to the version
+control system directly: they should be named starting with
+the *comments\_pagename* config option (usually `comment_`)
+and ending with `._comment`, for instance `comment_42._comment`.