The New Divi theme Sticky Option Allows you to make any part of the website sticky with the divi builder
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Divi Theme Tutorial: https://www.youtube.com/watch?v=vY_19T4jCSA
This new update for divi is groundbreaking. You can virtually add lots of sticky sections with Divi and make your wordpress website look really nice. If you havent trid the new divi theme sticky options, they you need to try it!