This article will show you how to access and use the the Positioning of column advanced tab.
1. Select the specific column you want to customize.
2. Click on Advance Settings (cog icon) then on Advance Options button to show the OP3 builder sidebar.
3. On OP3 builder sidebar, click the Positioning arrow to show the available options.
In there you can customize the column gutter, margin and padding and column height. Don’t forget to save the changes when done editing.