Creates a print view button using the do=export_html option. It's quite similar to the Print View Button, but it uses (action) buttons.

Open inc/template.php. Find (line 468)

    case 'profile':
      if($conf['useacl'] && $_SERVER['REMOTE_USER'] &&
         $auth->canDo('Profile') && ($ACT!='profile')){
        print html_btn('profile',$ID,'',array('do' => 'profile'));
        return true;
      }
      return false;
    default:
      print '[unknown button type]';
      return true;
  }

and change it to

    case 'profile':
      if($conf['useacl'] && $_SERVER['REMOTE_USER'] &&
         $auth->canDo('Profile') && ($ACT!='profile')){
        print html_btn('profile',$ID,'',array('do' => 'profile'));
        return true;
      }
      return false;
    case 'print':
      tpl_link(wl($ID,'do=export_html'), $pre.$suf, 'class="action print" accesskey="p" rel="nofollow"');
      return true;
    default:
      print '[unknown button type]';
      return true;
  }

Find (line 600)

    case 'profile':
      if($conf['useacl'] && $_SERVER['REMOTE_USER'] &&
         $auth->canDo('Profile') && ($ACT!='profile')){
        tpl_link(wl($ID,'do=profile'),$pre.$lang['btn_profile'].$suf, 'class="action profile" rel="nofollow"');
        return true;
      }
      return false;
    default:
      print '[unknown link type]';
      return true;

change it to

    case 'profile':
      if($conf['useacl'] && $_SERVER['REMOTE_USER'] &&
         $auth->canDo('Profile') && ($ACT!='profile')){
        tpl_link(wl($ID,'do=profile'),$pre.$lang['btn_profile'].$suf, 'class="action profile" rel="nofollow"');
        return true;
      }
      return false;
    case 'print':
      tpl_link(wl($ID,'do=export_html'), $pre.$suf, 'class="action print" accesskey="p" rel="nofollow"');
      return true;
    default:
      print '[unknown link type]';
      return true;

Next open /lib/tpl/default/design.css. Find “a.index” and copy the lines changing a.index into a.print. So

div.dokuwiki div.toolbox_sidebar a.index,

becomes

div.dokuwiki div.toolbox_sidebar a.index,
div.dokuwiki div.toolbox_sidebar a.print,

And

div.dokuwiki div.toolbox_sidebar a.index {
  background: transparent url(images/tool-index.png) 1px 1px no-repeat;
}

becomes

div.dokuwiki div.toolbox_sidebar a.index {
  background: transparent url(images/tool-index.png) 1px 1px no-repeat;
}
 
div.dokuwiki div.toolbox_sidebar a.print {
  background: transparent url(images/tool-print.gif) 1px 1px no-repeat;
}

Where url(images/tool-print.gif) is you print icon.

[...]

Do the same for the other instances of a.index

Next open /lib/tpl/default/main.php and add

<?php tpl_button('print')?>

wherever you want the print icon to appear. For example change

        <?php tpl_button('edit')?>
        <?php tpl_button('history')?>

to

        <?php tpl_button('edit')?>
        <?php tpl_button('print')?>
        <?php tpl_button('history')?>

And you should see your print icon appear between the edit and the histroy button