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karan Badhwar
Web Development Techdegree Graduate 18,135 PointsMargin
Does the margin with "auto" also depends on the Width. If yes, then how they determine the container width and which container they look for the reference
1 Answer
![Kyle Gonzales](https://uploads.teamtreehouse.com/production/profile-photos/11654832/micro_profile1.jpg)
Kyle Gonzales
Data Analysis Techdegree Student 2,577 PointsThe way I understand it, the margin is the outermost layer of the box model that surrounds your content. In order for the "auto" feature to function correctly you must assign a width to your content (the footer in this case) so the browser understands what width to keep centered in the window.
I hope this helps! -Kyle