MyBB Community Forums

Hi,
I'm just wondering how to set more than 2 sub forums to display on the index of the site.

Example, here on MyBB, the Plugins & Code Modifications section displays 4 sub forums below the description:

All discussion relating to plugins and code modifications belongs here.
* Releases & Release Support * Requests * Discussion * Development

ACP - Board Settings - Change - Forum Home Options - Subforums to show on Index listing

Thanks!