Configure at Admin → Extensions → Template Manager → rt_clarion(_j15) → Mobile.
You can load either dedicated mobile positions or standard module positions in Mobile view.
Configure at Admin → Extensions → Template Manager → rt_clarion(_j15) → Layouts the grid widths and allocated positions.
There are Features that are injected into a position when enabled in the Administrator, and are stacked vertically.
These are the Logo, Date, Font Sizer, Login Panel, Popup Model, RocketTheme Branding, Copyright, Top Top Scroller, System Messages and Reset Settings.
If no modules are published to a position, the entire area or row will not appear/collapse.
Documentation: Gantry Framework Layouts