Very dumb question from a vB n00b.

All right I am trying to get the default vB template to be similar to the one on this forum where the user name, user title, etc. is on the left and the post is on the right. I attached an image of a screen cap of this forum as an example, and I'm just wondering where in the CSS do I edit? Thanks in advance.

1) Go to admin cp
2) click on vBulletin Options
3) click Style and Language Settings
4) look for Use Legacy (Vertical) Postbit Template
5) change it to yes.