Here you can style your header and your navigation.
To open the customizer go to Appearance > Customize.
Behavior:
Change the behavior of the header to stick to the top of the page or keep it as normal.
Style:
Change the style of the header to simple, separator or shadow.
Appearance:
Change the appearance of the header to dark or light color scheme. Don’t forget to change the background color as well.
Background Color:
Change the header background color. It’s possible to change the opacity of it as well.
Menu:
Show or hide the header menu. It disappears automatically on responsive view.
Search:
Show or hide the search icon.
Responsive Navigation:
Show or hide the responsive navigation icon on different screen sizes.
Transparent Header Underline:
Show or hide the transparent header underline. You can select the transparent header option on each page or post.
Display Header:
Show or hide the entire header area.