There are several to options to choose. You can change navbar style and scroll effect globally via Appearance > Customize > Main Navbar > Main Navbar
Navigation:
- Navbar Style – choose between normal and narrow style,
- Navbar behavior – choose how the navigation bar will act after scrolling the page:
– Scroll Up Menu
– Scroll Up Top Bar
– Scroll Up Both
– Fixed Top Bar
– Fixed Menu
– Fixed Both - Navbar transparent,
- Search on navbar,
- Navbar search label – set custom text for search label,
- Navbar search icon class – choose FontAwesome icon for the search label

Main Navbar settings