Nesting Layout Elements
Newsletter Layout Elements, unlike CMS Page Layout Elements, can be nested inside of one another. Nesting one Layout inside of another allows you more control the appearance of your Newsletter.
To begin nesting, add any Layout to your Newsletter by clicking and dragging it onto the Newsletter, and release. Select a second Layout, and click and drag it within the bounds of the dotted line(s) of your first Layout, and release.
Content Elements can be added to either or or both Layouts, if one is nested.