<radDock:RadSplitContainer Orientation="Vertical" VerticalAlignment="Top"
x:Name="fundContainer" InitialPosition="DockedLeft" Margin="0,-2,0,0">
<radDock:RadPaneGroup x:Name="Group3" >
<radDock:RadPane x:Name="fundPane" Header="Fund Titles">
<telerikNavigation:RadTreeView x:Name="fundTitles"
HorizontalAlignment="Stretch"
HorizontalContentAlignment="Stretch"
VerticalAlignment="Stretch"
BorderBrush="{x:Null}"
Margin="0,0,0,0"
ItemsSource="{Binding}"
DataContext="{Binding}"
FontSize="11"
Selected="FundTitle_Selected">
<telerikNavigation:RadTreeView.ItemTemplate>
<DataTemplate>
<Grid Width="Auto">
<TextBlock Foreground="Black" Text="{Binding}" Width="Auto">
<ToolTipService.ToolTip>
<ToolTip x:Name="ToolTipText">
<TextBlock x:Name="hovertext" Text="{Binding}" Height="Auto" Width="Auto"
FontFamily="Verdana" FontSize="11" TextWrapping="Wrap"/>
</ToolTip>
</ToolTipService.ToolTip>
</TextBlock>
</Grid>
</DataTemplate>
</telerikNavigation:RadTreeView.ItemTemplate>
</telerikNavigation:RadTreeView>
</radDock:RadPane>
</radDock:RadPaneGroup>
<radDock:RadPaneGroup x:Name="treeGroup" >
<radDock:RadPane x:Name="treePane" Header="XBRL Hierarchy Tree">
<local:XBRLHierarchyTree x:Name="xbrlTree" Visibility="Visible" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" >
<local:XBRLHierarchyTree.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="White" Offset="1"/>
</LinearGradientBrush>
</local:XBRLHierarchyTree.Background>
</local:XBRLHierarchyTree>
</radDock:RadPane>
</radDock:RadPaneGroup>
</radDock:RadSplitContainer>
When I undock either panel the Title disappears although the title bar is still present. I looked at your examples and it looks like this should work.