Header > Site Header
Enable Sticky Header
Check on Enable Sticky Header to keep your site header at the top of the page when scrolled.
The sticky header is designed to automatically resize so it won’t take up as much screen real estate. View the logo spacing settings in Customizer > Site Identity to set the amount of “shrink” when a sticky header scrolls.
Enable Transparent Header
Check on Enable Transparent Header for an invisible header design. This header style will only display on pages that have a Page Header or a Group/Cover block set to “Full Align” as the first block in the content.