How to add margin to the Section element?

The Oxygen Section element by default does not have options for setting margins. But you can easily add margin in the Section settings in the Advanced > Custom CSS tab.

If you need to add the same margins for several Sections, then first add a class for the Section, and then add a custom CSS for this class

More details and screenshots: https://oxywp.com/how-to-add-margin-to-the-section-element-in-oxygen/