Section Settings
From Posstack.com Documentation
Easy Content Builder uses Section Settings as a special block to determine your ideal layouts (1-column, 2-columns, and 3-columns) within a section.
You can add as many sections on a page as you want. In each section, you create a Section Settings block to control the layout for that specific section.
Note: You should always keep the Section Settings at the bottom of the Content Blocks list that you might add to a section.
Next Steps:
Adding other content blocks (Please refer to the section Customize Template with Theme Editor and ECB Block Settings for more details)