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nathanielcusano
9,808 PointsCan't make heads or tails of what he's talking about. Is there a way he can point with a ruler at what he is referring?
I don't get anything he's saying because the objects he's referring to are not clear
2 Answers

John Haupenthal
2,749 PointsJust came to agree with post. An animated video of the margins or something would help, but there isn't much on the screen when he's breaking down what's happening with Google Dev and I found it difficult to follow.
Josh Olson
13,236 PointsI thought it made sense. He's pointing at the individual elements inside the page. I guess it may not make sense if the HTML is complex or the structure is unknown. Perhaps it would be best if he simplified it.
In which case maybe a text tutorial could be helpful. https://css-tricks.com/what-you-should-know-about-collapsing-margins/

nathanielcusano
9,808 PointsI see the 21 px now. But I can't find in the code how the <p> elements have a 16px margin?
Josh Olson
13,236 PointsThis is checked from the browser's developer tools. Right click an item on the page and select inspect element. On the sidebar right side lists all the styles used. Scroll down to the bottom and it will give you the box model dimensions with margins, border, padding, and size.
Treehouse also offers a course that looks at the Dev Tools for Chrome.