Assigning headings in documents is an important accessibility feature. Headings act much like an outline. Moving from heading to heading is the number one way people who use assistive technologies navigate to the section or content they need. Use Headings to provide sequential and relational understanding.
Highlight text and select appropriate ‘Heading’ from top menu bar on Styles sections in the HOME tab.
The first Heading in a document should be assigned as a Heading 1.
NOTE: There should be no less than one heading per 2 pages (per built-in MS Office accessibility check guidelines). Additionally, the using Headings in a document allows you to create a ‘linked’ Table of Contents opens a new window.
For information on how to customize your Headings, see Customize of Create New Styles opens a new window.