How to Create Index in Word is most reliable when you identify the exact feature involved and use the current supported workflow.
Steps
- Mark important index terms with References > Mark Entry.
- Choose the main entry/subentry and mark one occurrence or all appropriate occurrences.
- Repeat for the terms readers are likely to look up.
- Place the cursor where the index should appear and choose References > Insert Index.
- Update the index after editing the document.
How it works
A Word index is generated from XE (index entry) fields that you mark; it is different from a table of contents, which is based on headings.
Important considerations
Marking every occurrence automatically can create noisy or misleading indexes. Curate entries, cross-references, capitalization, and subentries for readers rather than indexing mechanically.
Additional guidance
Index entries can include page ranges using bookmarks and ‘See’/’See also’ cross-references. After generating the index, inspect adjacent duplicate entries and page ranges. Changes to pagination require Update Field so the displayed page references remain accurate.
Practical notes
For a book-length document, mark index entries as you edit rather than trying to index everything at the end. Turn on formatting marks/field-code visibility only when troubleshooting XE fields, since they can clutter the editing view. The generated index itself should be regenerated rather than manually corrected page by page.
Final verification
Indexing names requires consistent treatment of surnames, prefixes, and cross-references. Concepts may need subentries so readers can distinguish contexts rather than receiving a long undifferentiated page list. A good index is editorial work: Word automates page-number generation, not the judgment about what readers need.

Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.