Dual-tier sidebar navigation — Surfe UI

This is a dual-tier sidebar navigation bar with dropdown menus, search, and tabulation. Dual-tier navigations are useful for large and complex menus, and they also hide out of the way when not in use.

Sidebar navigations help the user navigate through an application. Vertically stacking navigation items is useful for fitting large menus. Sidebar navigations should be as helpful as possible, with clear and accessible links to everywhere the user may need to go without being cluttered/overwhelming.