diff --git a/Mk0.Software.ImageSorter/Main.Designer.cs b/Mk0.Software.ImageSorter/Main.Designer.cs
index 6916c88..5b390f8 100644
--- a/Mk0.Software.ImageSorter/Main.Designer.cs
+++ b/Mk0.Software.ImageSorter/Main.Designer.cs
@@ -500,7 +500,7 @@
             // buttonRandAlle
             // 
             this.buttonRandAlle.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
-            this.buttonRandAlle.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_left_icon;
+            this.buttonRandAlle.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_all_icon;
             this.buttonRandAlle.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
             this.buttonRandAlle.FlatAppearance.BorderColor = System.Drawing.Color.Silver;
             this.buttonRandAlle.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
@@ -515,7 +515,7 @@
             // buttonRandObenUnten
             // 
             this.buttonRandObenUnten.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
-            this.buttonRandObenUnten.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_left_icon;
+            this.buttonRandObenUnten.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_topbottom_icon;
             this.buttonRandObenUnten.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
             this.buttonRandObenUnten.FlatAppearance.BorderColor = System.Drawing.Color.Silver;
             this.buttonRandObenUnten.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
@@ -530,7 +530,7 @@
             // buttonRandLinksRechts
             // 
             this.buttonRandLinksRechts.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
-            this.buttonRandLinksRechts.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_left_icon;
+            this.buttonRandLinksRechts.BackgroundImage = global::Mk0.Software.ImageSorter.Properties.Resources.border_2_leftright_icon;
             this.buttonRandLinksRechts.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Stretch;
             this.buttonRandLinksRechts.FlatAppearance.BorderColor = System.Drawing.Color.Silver;
             this.buttonRandLinksRechts.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
@@ -802,7 +802,6 @@
             this.buttonPreview.Size = new System.Drawing.Size(23, 23);
             this.buttonPreview.TabIndex = 19;
             this.buttonPreview.UseVisualStyleBackColor = true;
-            this.buttonPreview.Visible = false;
             this.buttonPreview.Click += new System.EventHandler(this.ButtonPreview_Click);
             // 
             // panelPreview
diff --git a/Mk0.Software.ImageSorter/Main.cs b/Mk0.Software.ImageSorter/Main.cs
index c7c922f..3a870dc 100644
--- a/Mk0.Software.ImageSorter/Main.cs
+++ b/Mk0.Software.ImageSorter/Main.cs
@@ -1459,6 +1459,11 @@ namespace Mk0.Software.ImageSorter
             catch (Exception)
             {
             }
+
+            if (panelPreview.Visible)
+            {
+                ShowPreviewImages();
+            }
         }
 
         /// <summary>
@@ -1989,6 +1994,7 @@ namespace Mk0.Software.ImageSorter
 
         private void ShowPreviewImages()
         {
+            panelPreview.Controls.Clear();
             int panelWidthAvailable = panelPreview.Width - 11; //verfügbare breite abzüglich ränder links+rechts
             int previewImageWidth = 80; //breite eines preview-bildes
             int previewImageAbstand = 11; //abstand zwischen preview-bildern
diff --git a/Mk0.Software.ImageSorter/Mk0.Software.ImageSorter.csproj b/Mk0.Software.ImageSorter/Mk0.Software.ImageSorter.csproj
index 2ddc075..cc0cd3d 100644
--- a/Mk0.Software.ImageSorter/Mk0.Software.ImageSorter.csproj
+++ b/Mk0.Software.ImageSorter/Mk0.Software.ImageSorter.csproj
@@ -187,6 +187,9 @@
   </ItemGroup>
   <ItemGroup>
     <Content Include="Mk0.Software.OnlineUpdater.dll" />
+    <None Include="Resources\border-2-topbottom-icon.png" />
+    <None Include="Resources\border-2-leftright-icon.png" />
+    <None Include="Resources\border-2-all-icon.png" />
     <Content Include="Resources\heic.ico" />
     <Content Include="Resources\webp.ico" />
     <None Include="Resources\transform-rotate-270-icon.png" />
diff --git a/Mk0.Software.ImageSorter/Properties/Resources.Designer.cs b/Mk0.Software.ImageSorter/Properties/Resources.Designer.cs
index e197c4c..383856f 100644
--- a/Mk0.Software.ImageSorter/Properties/Resources.Designer.cs
+++ b/Mk0.Software.ImageSorter/Properties/Resources.Designer.cs
@@ -110,6 +110,16 @@ namespace Mk0.Software.ImageSorter.Properties {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap border_2_all_icon {
+            get {
+                object obj = ResourceManager.GetObject("border_2_all_icon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
         /// </summary>
@@ -130,6 +140,16 @@ namespace Mk0.Software.ImageSorter.Properties {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap border_2_leftright_icon {
+            get {
+                object obj = ResourceManager.GetObject("border_2_leftright_icon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
         /// </summary>
@@ -150,6 +170,16 @@ namespace Mk0.Software.ImageSorter.Properties {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap border_2_topbottom_icon {
+            get {
+                object obj = ResourceManager.GetObject("border_2_topbottom_icon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Ressource vom Typ System.Drawing.Bitmap.
         /// </summary>
diff --git a/Mk0.Software.ImageSorter/Properties/Resources.resx b/Mk0.Software.ImageSorter/Properties/Resources.resx
index 6187614..f875d05 100644
--- a/Mk0.Software.ImageSorter/Properties/Resources.resx
+++ b/Mk0.Software.ImageSorter/Properties/Resources.resx
@@ -241,4 +241,13 @@
   <data name="webp" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\webp.ico;System.Drawing.Icon, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="border_2_leftright_icon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\border-2-leftright-icon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="border_2_topbottom_icon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\border-2-topbottom-icon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="border_2_all_icon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\border-2-all-icon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/Mk0.Software.ImageSorter/Resources/border-2-all-icon.png b/Mk0.Software.ImageSorter/Resources/border-2-all-icon.png
new file mode 100644
index 0000000..1999aa5
Binary files /dev/null and b/Mk0.Software.ImageSorter/Resources/border-2-all-icon.png differ
diff --git a/Mk0.Software.ImageSorter/Resources/border-2-leftright-icon.png b/Mk0.Software.ImageSorter/Resources/border-2-leftright-icon.png
new file mode 100644
index 0000000..b6a03b0
Binary files /dev/null and b/Mk0.Software.ImageSorter/Resources/border-2-leftright-icon.png differ
diff --git a/Mk0.Software.ImageSorter/Resources/border-2-topbottom-icon.png b/Mk0.Software.ImageSorter/Resources/border-2-topbottom-icon.png
new file mode 100644
index 0000000..e337ad7
Binary files /dev/null and b/Mk0.Software.ImageSorter/Resources/border-2-topbottom-icon.png differ