Make a first-level heading (styled like a top-level heading by default.)

Make a second-level heading (styled like a tagline by default.)

Make a third-level heading (styled like a subhead by default.)

Make a fourth-level heading (styled like a small heading by default.)

Make a fifth-level heading (styled like a small heading by default.)

Select which of the base styles this heading should look like. Each of h1..5 has a default, check their docs to see if you don't need to override this.

Set some custom CSS in this heading. For example, maybe you need to tweak margins. Now you can!

Set some custom attribute. You can do anything here, but please don't make headers interactive! Use buttons or links instead so that keyboard and screen reader users can use the site too.