So I've done a powerdpoint document which is about 65 pages for my product design. When I export a PDF from powerpoint for mac it comes out without errors but all the colours are dull and shadow effects on the photos are bad... When I export all the slides in a picture format such as tiff's then combine the tiffs into a PDF document the document comes out much better. The file was originally created on a pc but not sure if this would affect anything. What can I check to improve the PDF output from powerpoint? I have CS4 installed and Acrobat Pro in it although I don't think its needed for this. Any suggestions?