This table:

Each row in the table represents a compositional layer of your code. The lowest layer is the set of all the source files in your code, considered as a single dependency graph. Above this are the design levels. The number of these depends on the "depth" of your composition hierarchy. The lower design levels typically contain bigger slices; the highest level typically contains the same items as the root node of the project.

The columns are:

Selecting a row in the table causes the group selector to be populated with more details about the orphans and tangles at that level.