open classes / class_tab.php
find
PHP Code:
public function createtab(){
$mysidia = Registry::get("mysidia");
$document = $mysidia->frame->getDocument();
if($this->num < 2 or $this->num > 5) throw new Exception("The number of tabs must be restricted between 2 to 5!",272);
and change 5 to 6. ( two times ! )
then open css / tabs.css
find
PHP Code:
<style type="text/css">
*
body { }
html { overflow-y: scroll; }
a { text-decoration: none; }
a:focus { outline: 0; }
p { margin: 0 0 20px 0; }
#page-wrap { width: 640px; margin: 30px;}
and change the page-wrap width to 740px.
Hope, this helps