Detailed Navigation 
Detailed navigation (DTN), an extension of top-level navigation (TLN), is displayed in the Detailed Navigation iView of the navigation panel, according to your role structure. The Detailed Navigation iView is assigned to the Desktop Innerpage as part of the Classic Framework Page, and as such is part of the initial content shipped with the portal. The Detailed Navigation iView therefore appears automatically on each page that you call in the portal.
The content that is displayed in detailed navigation depends on the roles assigned to you and on how you configure your TLN. For more information, see Configuring Levels of Top-Level Navigation.
Define your DTN through the property editor of the Detailed Navigation iView, which you access as follows:
(com.sap.portal.detailedNavigationTree)
For a list of DTN properties that determine specific functions, see Features Enabled Through DTN Properties.