At times, you will not want to use the default styling that Word provides for headings. You can create custom header styling using the style menu or you can update the style based on the formatting in your document.

Steps for Altering Styles from your Document

Highlight the header text
Select the desired heading style from the style menu
Right-click on the desired heading level and select "update heading to match selection" with a left-click.

update heading style option

Once you select this option, all headings of the selected level will use the updated styling.

Modifying Existing Heading Styles in the Styles Menu

Right click the heading you want to modify
Select Modify
Modify whatever features you like while keeping them WCAG compliant

As long as the style you are modifying started off as a heading, it will remain a heading with the updated formatting.

Mac Users

Use the same instructions above, but control+click to reveal the context menu or use the Styles Pane to update your selection.