r.a.d.panelbar takes full advantage of the Smart Tags introduced in Visual Studio 2005.
Using the Smart Tag Panel
When an instance of Telerik RadPanelBar is selected on the Web Form's design surface, a Smart Tag anchor is displayed in its top-right corner on mouse over.
Pic. 1 below shows the Smart Tag panel for an instance of Telerik RadPanelBar.

With Smart Tags, you can: