diff --git a/Examples/Nodify.Calculator/EditorView.xaml b/Examples/Nodify.Calculator/EditorView.xaml
index f6cf966..9e58ae3 100644
--- a/Examples/Nodify.Calculator/EditorView.xaml
+++ b/Examples/Nodify.Calculator/EditorView.xaml
@@ -435,12 +435,29 @@
                 </DataTemplate>
 
                 <DataTemplate DataType="{x:Type local:FunctionOperationViewModel}">
-                    <nodify:Node Header="{Binding Title}"
-                                 Input="{Binding Input}"
+                    <nodify:Node Input="{Binding Input}"
                                  Output="{Binding Output}"
                                  ToolTip="Double click to edit function"
                                  BorderBrush="#FF9800"
                                  BorderThickness="2">
+                        <nodify:Node.Header>
+                            <StackPanel Orientation="Horizontal">
+                                <TextBlock Text="ƒ"
+                                           FontSize="16"
+                                           FontWeight="Bold"
+                                           Foreground="#FF9800"
+                                           VerticalAlignment="Center"
+                                           Margin="0 0 6 0" />
+                                <TextBlock Text="{Binding Title}"
+                                           VerticalAlignment="Center"
+                                           FontWeight="SemiBold" />
+                            </StackPanel>
+                        </nodify:Node.Header>
+                        <TextBlock Text="⚡ Double-click to edit"
+                                   FontSize="10"
+                                   Foreground="#FF9800"
+                                   Opacity="0.8"
+                                   Margin="4 2" />
                         <nodify:Node.InputBindings>
                             <MouseBinding Gesture="LeftDoubleClick"
                                           Command="{Binding DataContext.OpenCalculatorCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"