I'm a huge fan of the `* { border: 2px dotted black; }``` snippet he uses to debug the flow of his content. I've been doing this for years now (albeit my snippe

I'm a huge fan of the `* { border: 2px dotted black; }``` snippet he uses to debug the flow of his content. I've been doing this for years now (albeit my snippet is a bit different) but it helps so much for understanding the document.