I've run into cases where it is assumed that a question on a quiz has been imported from a question library, but instead the quiz question is not associated with the equivalent item that may have been imported into the question library from another course or quiz. As a result the items need to be edited in both the quiz and again in the question library, or the item on the quiz needs to be deleted and replaced with an import of the same question that lives in the library.
Is there a quick, visual way when in the question library to identify whether questions in the question library are being used in quizzes vs those items that exist in the library, but are not used in any quizzes in that course?