Start with this entry from Steve Rindsberg's PPT FAQ:
Why are my PowerPoint files so big? What can I do about it?
http://www.rdpslides.com/pptfaq/FAQ00062.htm
Brief version: Make sure Fast Saves are off and resave under a new name.
Make sure the photos are the size they need to be for displaying
presentations. If they aren't, compress them - either from within PPT or
from a photo editor. Instructions are in the article
--
Kathryn Jacobs, Microsoft MVP PowerPoint and OneNote
Author of Kathy Jacobs on PowerPoint - Available now from Holy Macro! Books
Get PowerPoint answers at
http://www.powerpointanswers.com
I believe life is meant to be lived. But:
if we live without making a difference, it makes no difference that we lived