prs/prs.desktop/Panels/Staging/StagingPanel.xaml

<UserControl x:Class="PRSDesktop.StagingPanel"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:dynamicgrid="clr-namespace:InABox.DynamicGrid;assembly=InABox.Wpf"
             xmlns:local="clr-namespace:PRSDesktop" xmlns:wpf="clr-namespace:InABox.Wpf;assembly=InABox.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">

    <dynamicgrid:DynamicSplitPanel x:Name="mainPanel" View="Combined" MasterCaption="Setouts Folder" AnchorWidth="500">

        <dynamicgrid:DynamicSplitPanel.Master>
            <local:StagingSetoutGrid Grid.Column="0" x:Name="stagingSetoutGrid"/>
        </dynamicgrid:DynamicSplitPanel.Master>
            
        <dynamicgrid:DynamicSplitPanel.Detail>
            <dynamicgrid:DynamicSplitPanel x:Name="nestedPanel" View="Combined" AnchorWidth="1000" MasterCaption="PDF">
                <dynamicgrid:DynamicSplitPanel.Master>
                    <Border Grid.Row="0" BorderBrush="Gray" BorderThickness="0.5">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="auto"/>
                                <RowDefinition Height="*"/>
                            </Grid.RowDefinitions>
                            <Border Grid.Row="0" BorderBrush="Gray" BorderThickness="0.5">
                                <Label Content="Document Viewer" HorizontalAlignment="Center" FontWeight="DemiBold"/>
                            </Border>
                            <wpf:DocumentApprovalControl x:Name="documentPreviewer" Width="1000" Grid.Row="1"/>
                        </Grid>
                    </Border>
                </dynamicgrid:DynamicSplitPanel.Master>

                <dynamicgrid:DynamicSplitPanel.Detail>
                    <Border BorderBrush="Gray" BorderThickness="0.5">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="auto"/>
                                <RowDefinition Height="*"/>
                            </Grid.RowDefinitions>
                            <Label Grid.Row="0" Content="Manufacturing Packets" FontWeight="DemiBold" HorizontalAlignment="Center" Visibility="Hidden"/>
                            <local:ManufacturingPacketApprovalControl Grid.Row="1" x:Name="manufacturingControl" Visibility="Hidden"/>
                        </Grid>
                    </Border>
                </dynamicgrid:DynamicSplitPanel.Detail>

            </dynamicgrid:DynamicSplitPanel>
        </dynamicgrid:DynamicSplitPanel.Detail>
    </dynamicgrid:DynamicSplitPanel>

</UserControl>