lib/pkp/pages/about/index.php

<?php
 
switch ($op) {
   case 'index':
   case 'editorialTeam':
   case 'submissions':
   case 'contact':
      define('HANDLER_CLASS', 'AboutContextHandler');
      import('lib.pkp.pages.about.AboutContextHandler');
      break;
   case 'privacy':
   case 'aboutThisPublishingSystem':
      define('HANDLER_CLASS', 'AboutSiteHandler');
      import('lib.pkp.pages.about.AboutSiteHandler');
      break;
}