Go to Dashboard > Appearance > Customize > Sub Header
Enable/Disable sub header, set sub header height, add sub header background image or background color, customize sub header title and breadcrumbs.
Click on Publish Button.
Sub Header Individual Page Options
Click Pages (left sidebar).
Click the name of the page to be edited.
Go to "Page Options" metabox > Sub Header (Hero Banner)
Enable "Display Sub Header".
Set sub header display style (background image or slider), sub header height, sub header background image and color, customize sub header title and breadcrumbs.