Hi there,
so a H2 headline would return some HTML like so:
<h2 class="gb-headline gb-headline-c6ad2351 gb-headline-text">I am a H2 Headline</h2>
If you set the element tag to DIV then it would be:
<div class="gb-headline gb-headline-c6ad2351 gb-headline-text">I am a H2 Headline</div>
So its perfect for adding some pre-heading text without messing up the semantic layout of your headings.
By default it will inherit its typography and color settings from its parent. Which would normally be the Body Text styles from the customiser or if the headline is in a container block it will inherit ITs settings.
If you want to control this from the Customiser, which is what I would do – then in the Typography settings you can select a Custom CSS selector element from the list. In that field add: div.gb-headline
and now you can set its typography styles from there 🙂