You should add it in the definition of ribbonWindow, just like in standard WPF window:

<igRibbon:XamRibbonWindow x:Class="WpfApplication100.Ribbon"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:igRibbon="http://infragistics.com/Ribbon"

        Title="Ribbon" Height="300" Width="400"

                          WindowStartupLocation="CenterOwner">

</igRibbon:XamRibbonWindow>

Regards,

Anastas

Hi,

Can you please be more specific where I should add the syntax you mentioned. Please find bellow a snap of the code I'm using for the pop-up window

<igRibbon:XamRibbonWindow.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <Themes:PrimitivesOffice2k7Black/>
                <Themes1:DataPresenterOffice2k7Black/>
                <igEditorThemes:EditorsOffice2k7Black/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </igRibbon:XamRibbonWindow.Resources>
    <igRibbon:RibbonWindowContentHost>
        <igRibbon:RibbonWindowContentHost.Ribbon >
            <igRibbon:XamRibbon Theme="Office2k7Black" Height="25" >
                <igRibbon:XamRibbon.QuickAccessToolbar >
                    <igRibbon:QuickAccessToolbar Visibility="Collapsed" HorizontalAlignment="Left"/>
                </igRibbon:XamRibbon.QuickAccessToolbar>
                <igRibbon:XamRibbon.ApplicationMenu>
                    <igRibbon:ApplicationMenu Visibility="Collapsed" HorizontalAlignment="Left">
                    </igRibbon:ApplicationMenu>
                </igRibbon:XamRibbon.ApplicationMenu>
            </igRibbon:XamRibbon>
        </igRibbon:RibbonWindowContentHost.Ribbon>
        <igDock:XamDockManager Theme="Office2k7Black" Height="Auto" Width="Auto">