If you haven't discovered it yet, you may be surprised that OOo includes a PDF export feature. (It is rumored that OOo will sometime support PDF importing; you can read more here.) You don't have to purchase any Adobe or third-party software; just hit a button in OOo and you'll have a PDF of your document. This functionality alone can save you time and money in finding a convertor. We've tried many, many, freeware convertors to find one that could properly convert the hyperlinks within documents and had no success. That is until we used the PDF export feature in OOo, and found it preserves the links in its exported PDFs.
OOo can also enable bookmarks in the PDF file to act as a table of contents and a way for readers to easily navigate the document. See Figure 3 for an example. Additionally, OOo lets you set other advanced settings, such as image compression, user interface, and security options. To configure these settings, export to a PDF by clicking File - Export As PDF.
In order to obtain the PDF bookmarks, apply the heading styles (Heading 1, Heading 2, Heading 3, and so on) to the document's sections. After applying the style to the heading or section titles, you can change the font and formatting if desired. You can even create your own styles using the Style and Formatting Pane and then assign them to levels in the Outline Numbering dialog box so OOo will capture heading titles based upon your new styles. Finally, when exporting as a PDF, select Export bookmarks on the General tab of the Options dialog box. Additionally, you may want to select Bookmarks and page for the Panes setting on the Initial View tab, so the bookmarks of the PDF file will automatically appear when opening the file.