How do I use heading styles to denote hierarchy of information?

Most editing environments, including Canvas, Coursebuilder and Microsoft Word provide different heading styles.

In Canvas, the styles available are H2, H3, H4, Preformatted and Paragraph. You can see these in the menu bar when you are editing, in the drop-down menu under 'paragraph'.

When creating pages, it is a good idea to select heading and paragraph styles first. You can then choose other formatting such as bold, underline, colours, and text sizes.

screenshot identifying XYZ

The text on the Canvas course page uses H2, H3 and paragraph styles. The Heading, or name of the page, is set by Canvas at H1.

Heading 1 is usually a page title or a main content heading. As the most important heading, there is generally just on on the page.
Heading 2 is usually a major section heading.
Heading 3 is usually a sub-section of the Heading 2 and so on, ending with Heading 6.

From https://webaim.org/techniques/word/