Nymphamarina
Mashed Potato Jones
They are using the ImgLeft and ImgRight BBCode tags in order to snap an image to the left or right of their post to create the posting style. They can post it there everytime, but there are a lot of people who use a toolbar of sorts to automatically apply this post style to every post they create, I believe.
emotion_kirakira How do ya do that??
The ImgLeft and ImgRight BBCode tags actually have short cut buttons in the formatting tools for every post, so it's very easy to do. They work a lot like the regular IMG tag, but instead of displacing text to go below it, it allows text to go beside of it. Here are the examples of the tags.
ImgLeft
[imgleft]Image URL goes here[/imgleft]
ImgRight
[imgright]Image URL goes here[/imgright]
Toast Ninja above me has posted a great example of a posting style.