I don't know if that is an option available. We only added the CSS to put together the template and if an option is NOT available in the kunena default template, it's not going to be possible with our template.
I'd recommend getting your HTML into the PHP and CSS and investigating this further yourself.
If you like our support and products, tweet us at joomdev and let the world know about it.
JoomDev is not affiliated with or endorsed by Open Source Matters or the Joomla! Project. The Joomla! logo is used under a limited license granted by Open Source Matters the trademark holder in the United States and other countries.