This type of index requires an expertise in the subject because you tag the entries in the actual document. When you generate the index, Word uses those tags to determine what makes the index.

How to easily switch main entry and subentry terms in a Word index Your email has been sent Microsoft Word’s indexing feature is easy to implement. When creating a simple index, you mark terms ...

With an index, finding topics in your Word document becomes a smooth scroll instead of a needle-in-a-haystack hunt.