JD Atlanta is built on Helix 3 framework and it gives you the option to choose between Boxed layout or if you want wide layout which JD Atlanta is by default. Follow this video if you want to enable boxed layout.
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.