diff --git a/TBO/ApplicationLibrary.cs b/TBO/ApplicationLibrary.cs
index 92e762f..573bb4e 100644
--- a/TBO/ApplicationLibrary.cs
+++ b/TBO/ApplicationLibrary.cs
@@ -7,7 +7,7 @@
     class ApplicationLibrary : Application
     {
         Button btFullscreen = new Button("btFullscreen") { Image = Properties.Resources.screen_full_256, Top = 5 };
-
+        Panel pLib = new Panel("pLib") { Width = 500 };
         public ApplicationLibrary()
         {
             Add(btFullscreen);
@@ -16,6 +16,8 @@
         public override void ResizeTo(Size size)
         {
             btFullscreen.Left = size.Width - (btFullscreen.Width + 5);
+            pLib.Height = size.Height;
+            pLib.Left = (size.Width - pLib.Width) / 2;
         }
 
         public static string ApplicationId = "Library";
diff --git a/TBO/TBO.csproj b/TBO/TBO.csproj
index c4ce75e..d5e359c 100644
--- a/TBO/TBO.csproj
+++ b/TBO/TBO.csproj
@@ -64,6 +64,7 @@
     <Compile Include="UI\tboTK\Control.cs" />
     <Compile Include="UI\tboTK\IContiner.cs" />
     <Compile Include="UI\tboTK\Panel.cs" />
+    <Compile Include="UI\tboTK\UIExtension.cs" />
     <Compile Include="UI\UIManager.cs" />
     <Compile Include="UI\Windows\About.cs">
       <SubType>Form</SubType>
diff --git a/TBO/UI/Shell.cs b/TBO/UI/Shell.cs
index 8f38129..81c3af3 100644
--- a/TBO/UI/Shell.cs
+++ b/TBO/UI/Shell.cs
@@ -53,7 +53,7 @@
             g.DrawImage(bgImage, 0, 0);
 
             // Compose application
-
+            current?.Paint(g,clip);
         }
 
         public static Size Size { get => size; set => SetSize(value); }
diff --git a/TBO/UI/tboTK/Application.cs b/TBO/UI/tboTK/Application.cs
index 19f63ed..577fbc1 100644
--- a/TBO/UI/tboTK/Application.cs
+++ b/TBO/UI/tboTK/Application.cs
@@ -45,6 +45,12 @@
         #endregion
 
         public abstract void ResizeTo(Size size);
+        public void Paint(Graphics g, Rectangle clip)
+        {
+            foreach (Control c in controls.Values)
+                if (c.Clips(clip))
+                    c.Paint(g, clip);
+        }
 
         public abstract string Id { get; }
         public abstract string Title { get; }
diff --git a/TBO/UI/tboTK/Button.cs b/TBO/UI/tboTK/Button.cs
index e301875..68df901 100644
--- a/TBO/UI/tboTK/Button.cs
+++ b/TBO/UI/tboTK/Button.cs
@@ -6,8 +6,13 @@
     {
         public Button(string id) : base(id)
         {
-            Width = 100;
-            Height = 100;
+            Width = 75;
+            Height = 75;
+        }
+
+        public override void Paint(Graphics g, Rectangle clip)
+        {
+            g.DrawImageKeepRatio(Image, Left, Top, Width, Height);
         }
 
         public Image Image { get; set; }
diff --git a/TBO/UI/tboTK/Control.cs b/TBO/UI/tboTK/Control.cs
index 1fdf6b8..70028f9 100644
--- a/TBO/UI/tboTK/Control.cs
+++ b/TBO/UI/tboTK/Control.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Drawing;
 using System.Linq;
 using System.Text;
 
@@ -13,10 +14,18 @@
             Id = id;
         }
 
+        public bool Clips(Rectangle clip)
+        {
+            return Bounds.IntersectsWith(clip);
+        }
+
+        public abstract void Paint(Graphics g, Rectangle clip);
+
         public string Id { get; }
         public int Top { get; set; }
         public int Left { get; set; }
         public int Width { get; set; }
         public int Height { get; set; }
+        public Rectangle Bounds => new Rectangle(Left, Top, Width, Height);
     }
 }
diff --git a/TBO/UI/tboTK/Panel.cs b/TBO/UI/tboTK/Panel.cs
index 03f9d1f..484a4b1 100644
--- a/TBO/UI/tboTK/Panel.cs
+++ b/TBO/UI/tboTK/Panel.cs
@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Drawing;
 
 namespace TBO.UI.tboTK
 {
@@ -47,6 +48,13 @@
         }
         #endregion
 
+        public override void Paint(Graphics g, Rectangle clip)
+        {
+            foreach (Control c in controls.Values)
+                if (c.Clips(clip))
+                    c.Paint(g, clip);
+        }
+
         public bool Scrollable { get; set; } = false;
     }
 }
diff --git a/TBO/UI/tboTK/UIExtension.cs b/TBO/UI/tboTK/UIExtension.cs
new file mode 100644
index 0000000..c4e2631
--- /dev/null
+++ b/TBO/UI/tboTK/UIExtension.cs
@@ -0,0 +1,25 @@
+using System.Drawing;
+
+namespace TBO.UI.tboTK
+{
+    static class UIExtension
+    {
+        public static void DrawImageKeepRatio(this Graphics g, Image i, int x, int y, int width, int height)
+        {
+            int ww, hh, xx, yy;
+            xx = 0;
+            ww = width;
+            hh = i.Height * width / i.Width;
+            if (hh > height)
+            {
+                yy = 0;
+                hh = height;
+                ww = i.Width * height / i.Height;
+                xx = (width - ww) / 2;
+            }
+            else
+                yy = (height - hh) / 2;
+            g.DrawImage(i, x + xx, y + yy, ww, hh);
+        }
+    }
+}