This function is one of the advanced features available with the Advanced License.

 

The full text search function allows embedding search capabilities into your on-line (HTML) manuals without programming, server side scripting, or databases.  All functionality is implemented in Java Script and works in any popular web browser. No PHP or mySQL support is required on your web server. Because all indexes are stored in plain text files, the search function will work on shared or free hosting sites.

 

You can turn on the search feature in the HTML Template &  Layout dialog.