<igRibbon:XamRibbonWindow x:Class="SnippetApp.Window1"
xmlns:igRibbon="http://infragistics.com/Ribbon"
xmlns:igWindows="http://infragistics.com/Windows">
....
<igRibbon:RibbonGroup Id="Popup" Caption="Popup">
<Popup Name="myPopup"
Placement="Bottom"
PlacementTarget="{Binding ElementName=popupOpen}"
IsOpen="{Binding ElementName=popupOpen, Path=IsChecked}">
<igWindows:PopupResizerDecorator
ResizeMode="VerticalOnly"
ResizerBarStyle="{DynamicResource {x:Static igRibbon:XamRibbon.PopupResizerBarStyleKey}}">
<TextBlock Name="myPopupText" Background="LightBlue" Foreground="Blue">
My Popup Text
</TextBlock>
</igWindows:PopupResizerDecorator>
</Popup>
<igRibbon:ToggleButtonTool Name="popupOpen" HorizontalAlignment="Left" Width="150" Margin="0,0,0,0">Open popup</igRibbon:ToggleButtonTool>
</igRibbon:RibbonGroup>
....
</igRibbon:XamRibbonWindow>
