Every topic in the Document Center version of the Help has a Favorites button in the top-right corner. (Figure 1). Clicking the button when it's gray bookmarks the topic so that you can easily return to it. Bookmarks are kept in the navigation pane where the Table of Contents and Index are located. Use the Favorites button in the toolbar to display them.
IMPORTANT: Bookmarking uses your browser's local storage or, if that is unavailable, cookies to keep track of your favorite topics. To set bookmarks, you need to have local storage or cookies enabled. If you don't want to enable them, you will still be able to use the Help but you won't be able to bookmark topics.

Figure 1
When a topic is bookmarked, the Favourites button is yellow. Clicking the button when it's yellow removes the topic from the list of favorites (Figure 2). You can also remove the topic by clicking the {X] next to it in the Favorites list (Figure 2).

Figure 2