You can place the below code on any DIV directly as a child to <div id="s5_body_padding"> and it will make it show up full screen.
The below screenshot shows the admin area under the "layout" area of Vertex. You simply start adding names for the row names and then it will be enabled. Be sure to separate them by commas. You can enable the full page scroll to just show on the homepage only.
Fullscreen scroll navigation that shows on the right hand side of yoursite: