Learn more here: https://www.elegantthemes.com/blog/theme-releases/divi-feature-update-introducing-box-shadow-controls-for-all-modules-rows-and-sections

Today we are updating Divi with brand new Box Shadow options that give you the power to easily design wonderful shadow effects and apply them to any module, row or section on your page. You can build custom shadows using our new box shadow controls, or you can quickly select from many pre-made shadow styles and apply them to any element with a single click.