diff --git a/PDGServer_WPF/MainWindow.xaml b/PDGServer_WPF/MainWindow.xaml
index 0a09f43..31cbd2a 100644
--- a/PDGServer_WPF/MainWindow.xaml
+++ b/PDGServer_WPF/MainWindow.xaml
@@ -7,12 +7,12 @@
         Title="PDG Server" Height="768" Width="1024" Background="#FF4B4B4B">
     <Grid>
         <Grid.ColumnDefinitions>
-            <ColumnDefinition/>
+            <ColumnDefinition MaxWidth="700"/>
             <ColumnDefinition/>
         </Grid.ColumnDefinitions>
         <Grid>
             <Grid.ColumnDefinitions>
-                <ColumnDefinition/>
+                <ColumnDefinition MaxWidth="300"/>
                 <ColumnDefinition/>
             </Grid.ColumnDefinitions>
             <StackPanel>
@@ -52,8 +52,8 @@
             </Border>
         </Grid>
         <Grid Grid.Column="1" VerticalAlignment="Center">
-            <Image x:Name="PreviewImage" MinHeight="150" Stretch="Uniform" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
-            <Grid x:Name="PreviewImageOverlay"/>
+            <Image x:Name="PreviewImage" MinHeight="150" Stretch="Uniform" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+            <Grid x:Name="PreviewImageOverlay" HorizontalAlignment="Center" VerticalAlignment="Center" Width="{Binding ActualWidth, ElementName=PreviewImage}" Height="{Binding ActualHeight, ElementName=PreviewImage}"/>
         </Grid>
     </Grid>
 </Window>