The list of layouts and the drag and drop layout editor is the heart of how EasyLayouts creates/manages layouts for your site.
When you view the list in the backend it will look something like this:
List of Layouts
For each entry it tells you:
if the layout is published,
what type it is (see the article Types of Layout for more explanation),
any comment you have added to the layout
which Joomla component it relates to
the joomla view the item pertains to (in combination with the component relates to the equivalent template override)
any category restrictions (when there is a folder icon - you can hover your mouse to see the list of multiple assigned categories)
if the layout is the default. If you have multiple layouts (with no category restrictions) the published one marked as 'default' is the one that is used.
Joomla access level (see the article Layout Options for information about a special setting for 'blocked access')