Hi jokello68,
You can edit the line of code in this file:
[your_site_root]/plugins/system/t4/themes/base/html/layouts/t4/index.php
it's best to override this file so it'll be not be affected when you update the new version of T4, you can edit the file and copy it to this folder in the template:
[your_site_root]/templates/ja_spa/html/layouts/t4/