diff --git a/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperation.xaml b/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperation.xaml
index 9230298..4f267ec 100644
--- a/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperation.xaml
+++ b/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperation.xaml
@@ -156,7 +156,7 @@
                         <Border Grid.Row="0" Grid.Column="0" MinHeight="30">
                             <TextBlock Margin="10 0" FontSize="12" Foreground="#FFBBBBBB" FontWeight="Bold" Text="Option Type" VerticalAlignment="Center" HorizontalAlignment="Right"/>
                         </Border>
-                        <ComboBox Grid.Row="0" Grid.Column="1" ItemsSource="{Binding OptionList}" SelectedItem="{Binding SelectedOption}" Height="30" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="12" Padding="2"/>
+                        <ComboBox Grid.Row="0" Grid.Column="1" ItemsSource="{Binding OptionList}" SelectedItem="{Binding SelectedOption}" Height="30" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="12" Padding="2" IsEnabled="False"/>
                     </Grid>
 
                     <!-- SelectedOption is SMW-->
diff --git a/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperationViewModel.cs b/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperationViewModel.cs
index 07b2d81..8c1c564 100644
--- a/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperationViewModel.cs
+++ b/WeldingComponents/WeldingCommon/Views/Manual/RCC/UCManualRCCOperationViewModel.cs
@@ -402,7 +402,7 @@ namespace WeldingCommon.Views
             _Stopwatch = new Stopwatch();
 
             OptionList = new ObservableCollection<string> { "SMW", "Inzi", "LFW", "KS", "Flangeless" };
-            SelectedOption = OptionList[0];
+            SelectedOption = OptionList[3];
 
             var pixelResolution = ((_SystemParameter.CameraPixelSize) / _SystemParameter.LensMagnification) / 1000.0;
             _ObjectGenerator = new ObjectGenerator(pixelResolution);