Do you want to change the backgroud of a single slide? Well, go to the
slide you want to change background on and go to design. Then background
format. Select the background you want and say apply (not apply to all)
and it will only change the background of that slide.
If this does not work, try to read this article: 'Change background
color on a single slide in Microsoft Powerpoint? :: Free Tech Support
from Ask Dave Taylor!' (
http://tinyurl.com/rdm3fx)
and hope it could help you!
