What is the purpose of the index in a transcript?

The purpose of the index in a transcript is fundamentally to facilitate navigation and enhance the usability of the document. By listing page numbers where each witness's examination begins, the index enables readers, such as attorneys, judges, and other legal professionals, to quickly locate specific testimony. This is particularly important in legal proceedings where time is of the essence, and the ability to efficiently access witness statements can significantly impact the review process.

While the other options mention elements that might be found in legal documents, they do not accurately describe the primary function of an index. An index does not provide a full summary of the transcript or include a glossary of terms, nor is it solely focused on listing the names of witnesses without additional context. Therefore, the relevancy and practicality of the index in helping users navigate the transcript is best captured by identifying where each examination begins.