This guy did his master&#x27;s project on this subject, and put together this pretty great video: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=id86HeV-Vb8" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=id86HeV-Vb8</a><p>This is the first time I&#x27;ve heard of different zones, like the Main Content Zone, Peripheral Zone, etc.<p>Also the 3d renderings are extremely good at explaining the content.