How Do I Stretch Fan Page Photo Across Wall?

Alright so this is appearing more often for me on other fan pages and I am wondering on how it is done or if its automatic.

I am seeing fan page wall posts of photos that are stretched completely across the wall instead of side by side (left&right).

Here is an example of what I am talking about if you are unsure of what I am talking about.



I am looking for the solution to this as soon as possible...

I think my fan page will become more appealing if I can put photos in this format.

Click on the star in the upper right hand corner to "highlight" the post.

Thanks for the quick answer... this community is a life saver.