BELIGHT TEAM Hello Allan, we export documents in the highest possible quality (600 dpi) when PDF format is used. Compressed PDF has been removed by Apple from the default OS X Leopard installation, which need to be installed first. Here is where you can download it:
http://www.apple.com/downloads/macosx/automator/compresspdfworkflow.html
I can suggest you to use PDF filters to reduce file size, filters are available in Options menu in Export dialog. You can contact our tech-support if you need more assistance.
(Version 2.3.1)