Background Gifs

[graficon]

Greetings!

Please solve my mystery!  How do i prevent  an image from being tiled
when it's applied as a background gif on a web page. That is, are
background images special, or do i have to create a really large gif?
I find it hard to work in gfig with a 1000x1000 pixel image.  This of
course creates a very big gif for web loading...

Thanks!!!
  nancy