The Layout Manager has three tabs allowing you to configure different Layouts, Containers and Zones for the pages of your website.
In the Layouts tab you can Add or Import a layout, and make them active or inactive. Use the pencil icon to edit a layout and you have the option to copy a layout as well.
When you add a new Layout you will use the Layout Builder to create a custom layout by dragging the Container widget and Row widget into the Template Layout work area.
From the Containers tab you can Add a new container by giving it a Name, Tag Name, entering the Css Classes and Inline Styles. Click Update and Save to complete and have ready for use in your site.
Zones are created by making a zone container and a zone, fill in the fields as seen below and click Update and Save to complete.