The graph contents viewer provides sortable lists of the items and dependencies in the graph.
You can use it to locate things on a large graph - selecting an item or a dependency in the contents causes the corresponding item or dependency in the graph to be selected, and vice-versa.
Use the Scope drop-down to filter the list on tangles in the graph.
The graph contents viewer can be a useful alternative to the graph when the graph is too large to be displayed - use the drop-down to see if the graph is tangled, how big the tangles are, and to see the items involved in each tangle.
The "feedback edge"column on the dependencies tab indicates whether each edge is in the Minimum Feedback Set (mfs) in a tangled graph.