You can navigate within the Yelp Help Browser as follows:
To go back in document history:
Choose Go → Back.
Press Alt+left arrow key.
Use the Back button in the Toolbar.
To go forward in document history:
Choose Go → Forward.
Press Alt+right arrow key.
Use the Forward button in the Toolbar.
To go to help topics:
Choose Go → Help Topics.
Press Alt+Home.
Use the Help Topics button in the Toolbar.
To go to previous section:
Choose Go → Previous Section.
Press Alt+Up
To go to next section:
Choose Go → Next Section.
Press Alt+Down