Oxygen Section element by default has no options to set margins. But you can easily add the margin in the Section settings in the Advanced > Custom CSS tab.
Margin in specific section
If you need to set unique margins for a specific Section, then the CSS code for the ID must be added:
The screenshot above shows an example of adding a 20px top and bottom margin. Specify the value of the margins you need.
Margin in various sections
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:
Then add this class to all Sections that need to have the same margins. It's simple, see