prs/prs.desktop/Panels/DataEntry/ScanPanel.xaml

<UserControl x:Class="PRSDesktop.ScanPanel"
             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:local="clr-namespace:PRSDesktop"
             xmlns:sf="http://schemas.syncfusion.com/wpf"
             xmlns:dynamic="clr-namespace:InABox.DynamicGrid;assembly=InABox.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="4"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <local:ScanGrid Grid.Row="0"
                        x:Name="ScanGrid" OnSelectItem="ScanGrid_OnSelectItem" OnSelectAppliesTo="ScanGrid_OnSelectAppliesTo"
                        AllowDrop="True" PreviewDragOver="DynamicTabItem_DragOver" Drop="DynamicTabItem_Drop"/>

        <sf:SfGridSplitter Grid.Row="1"
                           Height="4"
                           HorizontalAlignment="Stretch"
                           Background="Transparent"
                           ResizeBehavior="PreviousAndNext"
                           Template="{StaticResource HorizontalSplitter}"
                           PreviewStyle="{StaticResource HorizontalSplitterPreview}"/>

        <Border Grid.Row="2"
                BorderBrush="Gray" Background="DimGray">
            <ScrollViewer VerticalScrollBarVisibility="Auto">
                <StackPanel x:Name="ViewListPanel" Orientation="Vertical" Margin="10"/>
            </ScrollViewer>
        </Border>
    </Grid>
</UserControl>