diff --git a/STDHelper/MainWindow.xaml b/STDHelper/MainWindow.xaml
index 290b8fb..17810b5 100644
--- a/STDHelper/MainWindow.xaml
+++ b/STDHelper/MainWindow.xaml
@@ -7,9 +7,11 @@
         mc:Ignorable="d"
         Title="MainWindow" Height="800" Width="1500">
     <Canvas HorizontalAlignment="Left" Height="800" Margin="0,0,0,0" VerticalAlignment="Top" Width="1500">
-        <Image x:Name="image1" Stretch="None" Height="500" Canvas.Left="130" Canvas.Top="10" Width="500" local:DraggableExtender.CanDrag="True"/>
+        <Image x:Name="image1" Stretch="None" Height="450" Canvas.Left="150" Canvas.Top="50" Width="450" local:DraggableExtender.CanDrag="True"/>
         <Button x:Name="btn_LoadScreenshot" Content="Load Screenshot" Canvas.Left="10" Canvas.Top="10" Width="75" Click="Btn_LoadScreenshot_Click"/>
-        <Image x:Name="image2" Stretch="None" Height="500" Canvas.Left="850" Canvas.Top="140" Width="500" local:DraggableExtender.CanDrag="True"/>
+        <Image x:Name="image2" Stretch="None" Height="450" Canvas.Left="150" Canvas.Top="50" Width="450" local:DraggableExtender.CanDrag="True"/>
         <Button x:Name="btn_Switch" Content="Toggle Switch" Canvas.Left="10" Canvas.Top="60" Width="75" Click="Btn_Switch_Click"/>
+        <ComboBox x:Name="cb_Screens" Canvas.Left="10" Canvas.Top="110" Width="120"/>
+        <Button x:Name="btn_DbgSave" Content="DBG save" Canvas.Left="10" Canvas.Top="155" Width="75" Click="Btn_DbgSave_Click"/>
     </Canvas>
 </Window>
diff --git a/STDHelper/MainWindow.xaml.cs b/STDHelper/MainWindow.xaml.cs
index f4050c4..43bc09d 100644
--- a/STDHelper/MainWindow.xaml.cs
+++ b/STDHelper/MainWindow.xaml.cs
@@ -9,6 +9,7 @@ using System.Drawing;
 using System.Windows.Forms;
 using System.Windows.Interop;
 using System.Linq;
+using System.IO;
 
 namespace STDHelper
 {
@@ -18,32 +19,50 @@ namespace STDHelper
     public partial class MainWindow : Window
     {
         private DispatcherTimer t;
+        private BitmapSource lastImage;
         public MainWindow()
         {
             InitializeComponent();
+            System.Windows.Controls.ComboBox cb = FindName("cb_Screens") as System.Windows.Controls.ComboBox;
+            Screen[] screens = Screen.AllScreens;
+            foreach(Screen s in screens)
+            {
+                cb.Items.Add(s.DeviceName);
+            }
+            cb.SelectedItem = cb.Items.GetItemAt(0);
+
             t = new DispatcherTimer();
             // Hook up the Elapsed event for the timer. 
             t.Tick += new EventHandler(OnTimedEvent);
             t.Interval = new TimeSpan(0, 0, 1);
         }
 
-        private void Btn_Load1_Click(object sender, RoutedEventArgs e)
+        private WriteableBitmap getAreaFromBitmap(BitmapSource src, Int32Rect area)
         {
-            System.Windows.Controls.Image i = FindName("image1") as System.Windows.Controls.Image;
-            LoadClipboardToImage(i);
-        }
+            // Calculate stride of source
+            int stride = src.PixelWidth * (src.Format.BitsPerPixel + 7) / 8;
 
-        private void LoadClipboardToImage(System.Windows.Controls.Image img)
-        {
-            BitmapSource bms = CopyScreen();
-            img.Opacity = 0.5;
-            img.Source = bms;
-        }
+            // Create data array to hold source pixel data
+            byte[] data = new byte[stride * area.Height];
 
-        private void Btn_Load2_Click(object sender, RoutedEventArgs e)
-        {
-            System.Windows.Controls.Image i = FindName("image2") as System.Windows.Controls.Image;
-            LoadClipboardToImage(i);
+            // Copy source image pixels to the data array
+            src.CopyPixels(area, data, stride, 0);
+
+            // Create WriteableBitmap to copy the pixel data to.      
+            WriteableBitmap target = new WriteableBitmap(
+              area.Width,
+              area.Height,
+              src.DpiX, src.DpiY,
+              src.Format, null);
+
+            // Write the pixel data to the WriteableBitmap.
+            target.WritePixels(
+              new Int32Rect(0, 0, area.Width, area.Height),
+              data, stride, 0);
+
+            // Set the WriteableBitmap as the source for the <Image> element 
+            // in XAML so you can see the result of the copy
+            return target;
         }
 
         private void Btn_Switch_Click(object sender, RoutedEventArgs e)
@@ -86,16 +105,26 @@ namespace STDHelper
 
         private void Btn_LoadScreenshot_Click(object sender, RoutedEventArgs e)
         {
-            System.Windows.Controls.Image i = FindName("image1") as System.Windows.Controls.Image;
-            LoadClipboardToImage(i);
+            System.Windows.Controls.Image i1 = FindName("image1") as System.Windows.Controls.Image;
+            System.Windows.Controls.Image i2 = FindName("image2") as System.Windows.Controls.Image;
+            System.Windows.Controls.ComboBox cb = FindName("cb_Screens") as System.Windows.Controls.ComboBox;
+            string scrStr = cb.SelectedItem as string;
+            Screen screen = Screen.AllScreens.Where(elem => elem.DeviceName == scrStr).SingleOrDefault();
+            BitmapSource bms = CopyScreen(screen);
+            WriteableBitmap crop1 = getAreaFromBitmap(bms, new Int32Rect(226, 123, 450, 450));
+            WriteableBitmap crop2 = getAreaFromBitmap(bms, new Int32Rect(685, 123, 450, 450));
+            i1.Source = crop1;
+            i1.Opacity = 0.5;
+            i2.Source = crop2;
+            i2.Opacity = 0.5;
         }
 
-        private static BitmapSource CopyScreen()
+        private static BitmapSource CopyScreen(Screen screen)
         {
-            var left = Screen.AllScreens.Min(screen => screen.Bounds.X);
-            var top = Screen.AllScreens.Min(screen => screen.Bounds.Y);
-            var right = Screen.AllScreens.Max(screen => screen.Bounds.X + screen.Bounds.Width);
-            var bottom = Screen.AllScreens.Max(screen => screen.Bounds.Y + screen.Bounds.Height);
+            var left = screen.Bounds.X;
+            var top = screen.Bounds.Y;
+            var right = screen.Bounds.X + screen.Bounds.Width;
+            var bottom = screen.Bounds.Y + screen.Bounds.Height;
             var width = right - left;
             var height = bottom - top;
 
@@ -112,6 +141,18 @@ namespace STDHelper
                 }
             }
         }
+
+        private void Btn_DbgSave_Click(object sender, RoutedEventArgs e)
+        {
+            Debug.WriteLine("SAVE CLICK");
+            using (var fileStream = new FileStream("debug.png", FileMode.Create))
+            {
+                Debug.WriteLine("START SAVE");
+                BitmapEncoder encoder = new PngBitmapEncoder();
+                encoder.Frames.Add(BitmapFrame.Create(this.lastImage));
+                encoder.Save(fileStream);
+            }
+        }
     }
 
     public class DraggableExtender : DependencyObject