Additional Content
The TabControl allows you to display additional content next to the tabstrip area.
The content is added using the AdditionalContent property of RadTabControl. The property can be used to visualize any content (e.g. image, text, button, etc.).
<telerik:RadTabControl>
<telerik:RadTabControl.AdditionalContent>
<telerik:RadButton Content="Button" />
</telerik:RadTabControl.AdditionalContent>
<telerik:RadTabItem Header="Calendar" />
<telerik:RadTabItem Header="Colors" />
<telerik:RadTabItem Header="Quote" />
</telerik:RadTabControl>
