Hi,

Thank you for your message.

Unfortunately you cant limit the second level in the hierarchical viewer, you can only limit the overall number of document in webpart settings.

I can however offer you an alternative using nested controls. You would basically use standart repeater to display categories and then in this transformation you would register a new repeater for product. We have a documentation for this scenario - please see http://devnet.kentico.com/docs/controls/index.html?cmsrepeater_overview.htm

Kind regards,
Richard Sustek