There are two categories of HTML templates: The HTML topic page templates that define your topic pages in all HTML-based output formats and an additional group of HTML templates used to define the additional components of Webhelp output.

HTML topic page templates:

These are the templates for your topics and they are used for all HTML-based output formats. They define everything in your topic pages except the topic content. They are stored in Configuration > HTML Page Templates.

Additional templates for Webhelp:

In addition to this there are also separate templates for the Frameset and the Table of Contents, Keyword Index and Full-text Search frames used in Webhelp to emulate the HTML Help viewer user interface. These templates are stored in Configuration > Publishing Options > Webhelp.