I am using XamDockManager which has multiple TabGroupPanes. My requirement is to have a "special" canned Tab that takes up complete space available in XamDockManager, Users would have the ability to drag drop panes into this canned tab. On Switching away from the canned Tab other tabs take over the complete View. I have not been able to accomplish this using various combinations of Split Panes, Content Panes, and Tab Group Panes. I was able to accomplish just the view using XamTabControl and having 2 tabs each having XamDockManager residing in them, however I could not drag drop panes across the XamTabControl Tabs.