All you need to do is go to the IDS Information Center and expand a category, such as "Administering" or "Security." Then find the "What's New" topic in each book. In some books, it's the first topic; in other books, it's in the Introduction chapter.
Each row in the table of new features in the "What’s New" topic contains the same short feature description that you saw the release notes. The row also contains links to the topics that have been added for the new feature or updated to include information on the new feature. Just click the link to go to the new or updated topic.
If you’re using PDFs, just open the PDF and navigate to the "What’s new" topic or search for the words "What’s New." Then find the row you want and click the link to jump to the desired topic.
Here's an example of the "What's New" topic in the Administrator's Guide: