How do I set gbWithNavPane variable to true in RH?

Hello. I'm using RH HTML v10.

In the cshdat_robohelp.htm file (that is dynamically created by RoboHelp and contains all the topic-to-help file mappings), there is a variable called “gbWithNavPane” that is initialized to false. Is there a setting I can toggle in the RoboHelp application so that the gbWithNavPane variable is set to true?

This will enable us to show a two pane browser window when a user accesses context sensitive help, where the left pane is the nav pane and the right pane shows the context sensitive help topic.

Thank you for any help you may be able to provide!