This is a side-head type of chapter template that outdents numbering for special prominence. It uses a condensed type, which helps to reduce page count while still presenting plenty of whitespace. Because of the generous use of whitespace, the template is easy on the eye. Because of the side-head area, the headings (which are also in red) are easy to spot and to scan quickly.
This section illustrates how we link from general information to the online-only reference topics. These topics don’t appear in the TOC; they are meant to be accessed via links from more general sections like these (you can also get to them by Search and Index of course).