Make use of styles in Microsoft Word.
Styles allow you to ‘tag’ text as different types, such as what is a heading, what is body text, what is a list. By tagging content and categorising it, you can then consistently format those types of text. This also allows screen readers to interpret the different styles.
Visit How to use styles in Microsoft Word (YouTube, 8m8s) (subtitles and closed captions available) to learn more.