db_begin_transaction();
  @ <form action="%s(g.zTop)/setup_timeline" method="post"><div>
  login_insert_csrf_secret();
  @ <p><input type="submit"  name="submit" value="Apply Changes" /></p>

  @ <hr />
  multiple_choice_attribute("Comment Format", "timeline-comment-format",
            "tcf", "0", count(azCommentFormats)/2, azCommentFormats);
            "tcf", "4", count(azCommentFormats)/2, azCommentFormats);
  @ <p>Each timeline entry contains between one and three of the following subsections:
  @ <blockquote><table border=0 cellpadding=0>
  @ <tr><td>[hash]<td>&nbsp;&nbsp;<td>an artifact hash with a hyperlink to a detail page
  @ <tr><td>comment<td><td>the check-in comment or other text describing the item
  @ <tr><td>(details)<td><td>details about the entry, such as the user, branch, tags, etc.
  @ </table></blockquote>
  @ This setting selects which of the three subsections are included on each