A good index file helps users to locate the information they need. HTML Help Workshop provides the tools needed to create and edit an index file for your help system.
To create an index file
On the File menu, click New, and then click Index.
Add keywords to the index (.hhk) file you have created. If you plan to use your index only on a Web site, you can create a site map index.
Notes
If you are designing a help system using the Help Viewer, adding an index file to your help project will also create the Index tab in the Navigation pane after the project is compiled.