Background question

[AbnVet]

I love the ability to change the backgrounds and use the built in stretch function. I was wondering how to go about determining what will actually show on the left/right header and etc.... so that I can design something for my needs. I attached a screenshot to help further illustrate

 

[Russ]

Using the backstretch it's kind of hard to make it specific like that to be honest, while you could get it looking the way you want on your resolution, anyone with a different resolution would see it differently.

Could always do ads on those spots I suppose, like:

http://8wayrun.com/ (with ad block disabled)