The Save to PDF option is not built within PowerPoint 2007, or the other programs in Office 2007 by default. However, you can easily download a small add-in that makes it possible to save PDFs from within PowerPoint 2007 by following the steps in the Getting Office 2007’s Save as PDF Add-in tutorial. Once you have downloaded and installed the Save as PDF Add-in, follow these steps to use it in PowerPoint 2007.
Learn how to use the Office 2007 Save as PDF add-in in PowerPoint 2007 for Windows.

