You can edit header by navigate Reen > Header.
Logo
Site Logo
You can enable to display logo instead of site title.
Top Bar
Enable Top Bar: You can enable or disable top bar.
Enable Top Bar Left: You can enable or disable top bar left.
Enable Top Bar right: You can enable or disable top bar right.
Sticky Header
Enable or disable sticky header. Sticky Header means header remain visible even after the user scrolls down on the page. If not the whole, at least a part of the header is visible depending on its settings.