Layouts provide a framework for organizing portlets on a page. Each page has a default layout. You can customize the layouts used on My Page or on pages you create within My Folder so that you can position portlets above, below, or adjacent to one another. A variety of layouts are available to choose from.
One example of using multiple layouts is to put a controlling portlet in one column layout and beneath it use a multiple column layout to place its subordinate portlets.
You can change an existing layout, add layouts to a page, move a layout within a page, or remove a layout. These activities are performed in the Page/Folder Customizer section of the page’s edit mode.