From what I can tell, there are no drill-down TOC images available for desktop or tablet views in the Indigo responsive layout. In the editor within RoboHelp, it looks like drill-down images are only available for the mobile view (see first screenshot below). I have a large help system with many topic levels and would like drill-down arrows to appear in all views, not just mobile.
Does anyone have a suggestion on how to get drill-down images to display in tablet and desktop views, or know why this limitation exists (before I submit a feature request)?
Layout editor in RoboHelp:
Example of generated layout with no drill-down arrows (tablet view):