2 columns for post in showthread.php

[Palyriot]

I'm tried looking for the answer all over the forums and even asking in the chat for the answer, but they told me to post here. Sorry if it's an obvious one, but I'm trying to figure out how to make it so on showthread.php every post is 2 columns instead of 2 rows. I saw the option before, reset my forum and now I can't find it anymore. I've literally gone through every option for my forum. Thanks for the help from anyone that even reads this. If you need an example of what I am talking about, you can see on the forum I am making right here: http://php-area.com/showthread.php?t=2

You can see how the Username and info is above the post itself. I want the username and info on the left and the post on the right.