Hi Wendell,
Thanks for Choosing Syncfusion Products,
In DockingManager , there is no direct way to display the tooltip for Docked window which is tabbed. But you can achieve this by Overriding Style for TabItem Template. Please find the Attached Sample.
In this i used attached property ElementToolTip to define tooltip for Individual Element , in style for TabItem i set this attached property value to the ToolTip property value of TabItem in setter.
Regards,
HemanthKumar K
MyToolTip_309aef0c.zip