This is a list of available content elements that can be placed on the working canvas or inside of the columns. Think of them as bricks. With those bricks you are building your layout. Most of the content elements have options, to set them click pencil icon. To save changes click save button.

Columns are part of the row and they hold your content elements inside them. Columns can be reordered. Click and drag column around (horizontal axis). That way you can group elements in logical groups and then drag them around with your mouse (to re-position).

That way you can group elements in logical groups and then drag them around with your mouse (to re-position).