Andrea,

Greetings from PrestoPhoto and thanks for your interest.

Here's a link to our website about PDF Specs that should help :)

http://www.prestophoto.com/wiki/PDF+Specs

Please let us know if you need anything else!

PrestoPhoto support

Hi, I am also using Adobe Pro 9 and Powerpoint 2007. When I change the pdf resolution to output from Powerpoint I'm not sure which of the following conversion settings to select:
High Quality Print
PDF/A-1b:2005(CMYK)
PDF/A-1b:2005(RGB)
PDF/X-1a:2001
PDF/X-3:2002
Press Quality

Thanks!