You can add Next and Previous buttons to an HTML Help window using FAR's HHP Editor editor. An example of the Previous and Next buttons are shown below:

The Previous and Next buttons were originally documented by Microsoft when HTML Help was released (these buttons are described in viewhlp.chm, which is a free to distribute Help file from Microsoft describing how to use HTML Help). If you are interested in obtaining a copy of viewhlp.chm, drop me a line at viewhlp@magrino.com, and I'll send you a copy. Microsoft never added the Next and Previous buttons' functionality to the HTML Help Workshop, so most Help Authoring Tools don't allow you to enable the buttons either.
The Previous and Next buttons resemble RoboHelp HTML Browse Sequences, however, because these are Microsoft buttons, they do not require the distribution of any additional files (RoboHelp Browse Sequences [for HTML Help] require the distribution of HHActiveX.DLL). The only requirements of Next and Previous buttons are to create a binary Table of Contents and to turn on the buttons. However, enabling the Next and Previous buttons is a challenge since few programs have an option to enable the buttons.
FAR has the ability to turn on the buttons. You'll learn how in the next topic.