how do i set for a fixed background?

I like the background we have now but would prefer if it were fixed.How do you do this here?
There's no setting for it when you upload the url for your own background.Is there some way to set this for fixed?
http://pillar.bigforumpro.com/index.htm

OUR BOARD

styles>colors>CSS Stylesheet>

and put this code in

Code:

body {
  background-attachment:fixed;
  background-repeat:no-repeat;
  background-position:top center;}

then hit save

Well, that would also remove all repeating of your background. If you want it only to be fixed, you can go to "Styles / List of Pictures" and check the box "Background fixed" nearby the background-page entry.

thank you.for some reason i didn't see that.
Will look for it and git er done.
Again Thanks!

ps love this place.wish i'd found it sooner.Like the features.how our board turned out.The support over here.Pretty much everything about this place.