 <p>Check out <a href="http://www.orchardproject.net/docs/Managing-widgets.ashx" rel="nofollow">this link</a> to understand the concept of layers and zones.</p> <p>Basically, you can customize the zone (a place to put a widget or a place where content goes) layout of a particular page by matching it to a layer (using a rule defined in by the layer). The layer structure allows for inheritance.</p>