Go to the Home tab > Paragraph section and click the multilevel list button. What we're going to do first is define a new list style to create a personalized numbering for our titles. How to Build a Table of Contents in Microsoft Word How to Define Numbering Styles in Word So how can you build a customizable and structured table of contents with pretty personalized titles and numbering? You'll learn how in this guide. Not to mention that non-harmonized styles throughout the file can mess with the overall hierarchy of titles. This wouldn't be a big problem for smaller documents, but with hundreds of pages in a file it ruins the user experience and makes it painful to navigate from one section to another.

You might often encounter documents that have messy tables of contents along with navigation panes with links to missing headings, non harmonized styles, and badly structured sections. It's tricky to make a good-looking and functional table of contents in Microsoft Word.