The "Edit Layout" tool allows you to modify the layouts of your catalog, you can add images, text, and products wherever you want on the pages of your catalogs.
This tool is only shown in catalogs created after this tool was made available.
Catalog with the "Edit Layout" tool
If your catalogs were created before the additions of the plans Personal, Business, Enterprise, and Premium, the "Edit Layout" tool will not be available.
Catalog without the "Edit Layout" tool