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Extend the navigation

Describes how to extend the navigation for Optimizely Content Management System (CMS) version 11.21 and higher.

You can extend the navigation to let editors access Optimizely Content Management System (CMS) and other products from the global menu.

Attributes and menu providers must reside in an assembly configured as [a shell module](doc:configuring-shell-modules].

In version 11.21 of CMS UI, a new global navigation menu was introduced that differs slightly from how it worked before. If you are upgrading from the old global navigation menu to the new, see Upgrade navigation.