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The home page works the same as the "Subpage Fullwidth Sections" with the addition of featured content in the header area.
The Home Page feature uses two different sections. If a user is visiting the site for the first time the section, "Home Smart - Welcome New" is used. If the user has visited before the section, "Home Smart - Welcome" is used.
These sections support subpage styles, multi-columns, etc.
The above screenshot labels all the areas of your Home Page so you can see which sections you can change.