You can now save files created by many 2007 Microsoft Office system programs in Portable Document Format (PDF), which is a common format for sharing documents. However, before you can save files as PDF, you need to install an add-in. To install the add-in, either click on the link above, or search for “save as PDF” in Word 2007 help, then simply follow the instructions, and, once complete, PDF will become an option in the “Save as type” dialog.