Bookmarks allow you to flag paragraphs of particular interest in the 18th edition of The Chicago Manual of Style Online for easy retrieval.
Bookmarks can be used only with the numbered paragraphs of chapters 1–15. Each paragraph can contain only one Bookmark.
Inserting Bookmarks
To insert a Bookmark,
1. Click on the Bookmark It icon below the paragraph 
.
2. The paragraph number will appear highlighted, indicating that the Bookmark has been successfully inserted.
Viewing Bookmarks
You can view the distribution of your Bookmarks in two locations:
1. On the main Table of Contents page. For any chapter that includes Bookmarks, the Bookmark icon appears to the right of the chapter title. (If there are also Notes in the chapter, the Note icon appears to the right of the Bookmark icon.) The icon includes a number, indicating the number of paragraphs in that chapter that contain Bookmarks. It does not identify which paragraphs contain the Bookmarks.
2. On the chapter contents page for each chapter. Each paragraph that contains a Bookmark displays the Bookmark icon to the right of the paragraph title. (If the paragraph also contains a Note, the Note icon appears to the right of the Bookmark icon.) To go to that paragraph, click on the paragraph number or title.
The Bookmark icons on both the main Table of Contents page and the chapter contents pages will be updated immediately when you insert or remove a Bookmark from a paragraph.
Bookmarks are not stored in folders and do not have titles separate from the titles of the paragraphs that contain them.
Removing Bookmarks
To remove a Bookmark,
1. Click on the Remove Bookmark icon, which is the first icon below the paragraph if the paragraph contains a Bookmark 
.
2. The red highlighting of the paragraph number will disappear, indicating that the Bookmark has been successfully removed.