In Metaboxes “Layout Pages” you can choose the page layout. The page could be fullwidth, with the sidebar on the left or the sidebar on the right. Be sure that the “Layout Pages” is checked in your Screen Option of the page ( top left of the page).
If you choose the layout with the sidebar you must set the sidebar to display in “Sidebar Settings” ( See how in the next Options Page ).
In Metaboxes “Option Page” you can set the “Header Setting” and choose the header image. You can also select in the “Color Settings” the main color of the page ( important if you want to display the info bar of the page ) , the “General Setting” of the page like the Title of the page, the info bar and associate sidebar in “Sidebar Settings”.
See the video below for see step by step how to set a new page: