diff --git a/MainWindow.axaml b/MainWindow.axaml
index 16af180..926b0f9 100644
--- a/MainWindow.axaml
+++ b/MainWindow.axaml
@@ -220,7 +220,6 @@
                                             <Label FontSize="9"
                                                    Content="Elemente der ersten Menge ohne Elemente der zweiten Menge" />
                                         </StackPanel>
-
                                     </Button>
                                     <Button HorizontalAlignment="Stretch" MinWidth="240"
                                             HorizontalContentAlignment="Center" x:Name="BtnCombineSymmetric"
@@ -248,6 +247,24 @@
                                         <CheckBox HorizontalAlignment="Left" x:Name="CbMergeDeleteOld" IsChecked="False">Lösche ursprüngliche Sets</CheckBox>
                                     </StackPanel>
                                 </StackPanel>
+                                <Label HorizontalAlignment="Center" Content="Reihenfolge:"></Label>
+                                <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Spacing="10">
+                                    <ListBox x:Name="LstCombineAddressSetSort" SelectionMode="Single" SelectionChanged="LstCombineAddressSetSort_OnSelectionChanged"></ListBox>
+                                    <StackPanel Orientation="Vertical">
+                                        <Button HorizontalAlignment="Stretch" MinWidth="40"
+                                                HorizontalContentAlignment="Center" x:Name="BtnCombineAddressSetSortUp"
+                                                Click="BtnCombineAddressSetSortUp_OnClick"
+                                                Margin="0,0,0,10">
+                                            <LucideIcon Kind="ArrowBigUp" Width="36" Height="36" />
+                                        </Button>
+                                        <Button HorizontalAlignment="Stretch" MinWidth="40"
+                                                HorizontalContentAlignment="Center" x:Name="BtnCombineAddressSetSortDown"
+                                                Click="BtnCombineAddressSetSortDown_OnClick"
+                                                Margin="0,0,0,10">
+                                            <LucideIcon Kind="ArrowBigDown" Width="36" Height="36" />
+                                        </Button>
+                                    </StackPanel>
+                                </StackPanel>
                             </StackPanel>
                         </Grid>
                         <Grid Grid.Row="2" Margin="20" ColumnDefinitions="*,5*,*" IsVisible="False" x:Name="GrdExportMarginOptions">
diff --git a/MainWindow.axaml.cs b/MainWindow.axaml.cs
index b1ed756..8cabd25 100644
--- a/MainWindow.axaml.cs
+++ b/MainWindow.axaml.cs
@@ -669,6 +669,15 @@ public partial class MainWindow : Window
                     BtnRepair.IsEnabled = false;
                 }
         }
+        
+        LstCombineAddressSetSort.Items.Clear();
+        foreach (var selected in LstCustomerAdressSets.SelectedItems)
+        {
+            try
+            {
+                LstCombineAddressSetSort.Items.Add(selected as  KasAddressList);
+            } catch {}
+        }
     }
 
     private async void BtnSettingsImportCustomerAddressPatch_OnClick(object? sender, RoutedEventArgs e)
@@ -728,7 +737,7 @@ public partial class MainWindow : Window
     private void BtnCombineDifference_OnClick(object? sender, RoutedEventArgs e)
     {
         var list = new List<KasAddressList>();
-        foreach (var item in LstCustomerAdressSets.SelectedItems)
+        foreach (var item in LstCombineAddressSetSort.Items)
             list.Add((KasAddressList)item);
         try
         {
@@ -743,7 +752,7 @@ public partial class MainWindow : Window
     private void BtnCombineUnion_OnClick(object? sender, RoutedEventArgs e)
     {
         var list = new List<KasAddressList>();
-        foreach (var item in LstCustomerAdressSets.SelectedItems)
+        foreach (var item in LstCombineAddressSetSort.Items)
             list.Add((KasAddressList)item);
         try
         {
@@ -759,7 +768,7 @@ public partial class MainWindow : Window
     private void BtnCombineIntersection_OnClick(object? sender, RoutedEventArgs e)
     {
         var list = new List<KasAddressList>();
-        foreach (var item in LstCustomerAdressSets.SelectedItems)
+        foreach (var item in LstCombineAddressSetSort.Items)
             list.Add((KasAddressList)item);
         try
         {
@@ -788,7 +797,7 @@ public partial class MainWindow : Window
     private void BtnCombineSymmetricDifference_OnClick(object? sender, RoutedEventArgs e)
     {
         var list = new List<KasAddressList>();
-        foreach (var item in LstCustomerAdressSets.SelectedItems)
+        foreach (var item in LstCombineAddressSetSort.Items)
             list.Add((KasAddressList)item);
 
         StartCombine(list, Convert.ToInt32((LstCustomers.SelectedItem as Customer).ID), "symdiff", GetCombiningTyp());
@@ -1301,4 +1310,56 @@ public partial class MainWindow : Window
 
         StartAddressRepairer((KasAddressList)LstCustomerAdressSets.SelectedItem);
     }
+
+    private void BtnCombineAddressSetSortUp_OnClick(object? sender, RoutedEventArgs e)
+    {
+        var selected = (LstCombineAddressSetSort.SelectedItem as KasAddressList);
+        int index = LstCombineAddressSetSort.SelectedIndex;
+        if (LstCombineAddressSetSort.SelectedIndex != null && LstCombineAddressSetSort.SelectedIndex != -1)
+        {
+            try
+            {
+                LstCombineAddressSetSort.Items.RemoveAt(index);
+                LstCombineAddressSetSort.Items.Insert(index-1, selected);
+                LstCombineAddressSetSort.SelectedIndex = index - 1;
+            } catch {}
+        }
+    }
+
+    private void BtnCombineAddressSetSortDown_OnClick(object? sender, RoutedEventArgs e)
+    {
+        var selected = (LstCombineAddressSetSort.SelectedItem as KasAddressList);
+        int index = LstCombineAddressSetSort.SelectedIndex;
+        if (LstCombineAddressSetSort.SelectedIndex != null && LstCombineAddressSetSort.SelectedIndex != -1)
+        {
+            try
+            {
+                LstCombineAddressSetSort.Items.RemoveAt(index);
+                LstCombineAddressSetSort.Items.Insert(index+1, selected);
+                LstCombineAddressSetSort.SelectedIndex = index + 1;
+            } catch {}
+        }
+    }
+
+    private void LstCombineAddressSetSort_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        if (LstCombineAddressSetSort.SelectedIndex == 0)
+        {
+            BtnCombineAddressSetSortDown.IsEnabled = true;
+            BtnCombineAddressSetSortUp.IsEnabled = false;
+        } else if (LstCombineAddressSetSort.SelectedIndex == LstCombineAddressSetSort.Items.Count - 1)
+        {
+            BtnCombineAddressSetSortUp.IsEnabled = true;
+            BtnCombineAddressSetSortDown.IsEnabled = false;
+        } else if (LstCombineAddressSetSort.SelectedIndex == LstCombineAddressSetSort.Items.Count - 1 && LstCombineAddressSetSort.SelectedIndex == 0)
+        {
+            BtnCombineAddressSetSortUp.IsEnabled = false;
+            BtnCombineAddressSetSortDown.IsEnabled = false;
+        }
+        else
+        {
+            BtnCombineAddressSetSortDown.IsEnabled = true;
+            BtnCombineAddressSetSortUp.IsEnabled = true;
+        }
+    }
 }