You can create a simple keyword index or a comprehensive, detailed guide to the information in your book. You can create only one index for a document or book. To create an index, you first place index markers in the text. You associate each index marker with the word, called a topic, that you want to appear in the index.
When you generate the index, each topic is listed, along with the page on which it was found. The topics are sorted alphabetically, typically under section headings (A, B, C, and so on). An index entry consists of a topic (the term readers look up) paired with either a page reference (page number or range) or a cross-reference. A cross-reference, preceded by “See” or “See also,” points the reader to other entries in the index, rather than to a page number.