If you generate a Table of Contents in a file (or book) in InDesign, hyperlinked bookmarks are automatically generated when you export to PDF with Hyperlinks and Bookmarks options checked in the export dialog. Bookmarks make it easy for readers of the PDF to find information quickly: displayed in the Navigation pane in Acrobat or Reader, they serve as a dynamic table of contents that’s always available.
Sometimes I want the bookmarks in the PDF, but without a visible table o’contents in the file. In the past, I’ve generated my TOC in InDesign, but put it in the pasteboard. The text isn’t visible in the PDF, but the bookmarks are created.
Today I discovered that this trick doesn’t work in InDesign CS4! Instead, the TOC text frame has to have at least an edge hanging into a document page for the bookmarks to be created. While this isn’t fatal, it’s weird that the functionality has changed.