Auto-expansion of TOC in RoboHelp 2017

Hi,

Is it possible to keep the TOC in the navigation pane of Online Help auto-expanded, so that the user doesn't have to click a book in the TOC to open rhe topics inside it? If yes, could you guide me with the steps to achieve it, please?

Can a user view a book and the topics inside it by default with no click action needed on the book?

Thanks and Regards,

Arijit