Avalonia/samples/ControlCatalog/Pages/NavigationPage/NavigationPageAttachedMethodsPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.NavigationPageAttachedMethodsPage">
  <DockPanel>
    <ScrollViewer DockPanel.Dock="Right" Width="270">
      <StackPanel Margin="12" Spacing="8">

        <!-- SetHasNavigationBar -->
        <TextBlock Text="SetHasNavigationBar" FontWeight="SemiBold" FontSize="13" />
        <TextBlock Text="Controls whether the navigation bar is visible for a specific page. Does not affect other pages in the stack."
                   FontSize="11"
                   Opacity="0.6"
                   TextWrapping="Wrap" />
        <CheckBox x:Name="HasNavBarCheck"
                  Content="Show navigation bar"
                  IsChecked="True" />

        <Separator />

        <!-- SetHasBackButton -->
        <TextBlock Text="SetHasBackButton" FontWeight="SemiBold" FontSize="13" />
        <TextBlock Text="Shows or hides the back button for a specific page, regardless of the global IsBackButtonVisible setting."
                   FontSize="11"
                   Opacity="0.6"
                   TextWrapping="Wrap" />
        <CheckBox x:Name="HasBackButtonCheck"
                  Content="Show back button"
                  IsChecked="True" />

        <Separator />

        <!-- SetBackButtonContent -->
        <TextBlock Text="SetBackButtonContent" FontWeight="SemiBold" FontSize="13" />
        <TextBlock Text="Sets custom content for the back button on a page. Accepts any string or Control. Leave blank to use the default arrow icon."
                   FontSize="11"
                   Opacity="0.6"
                   TextWrapping="Wrap" />
        <ComboBox x:Name="BackButtonCombo"
                  SelectedIndex="0"
                  HorizontalAlignment="Stretch">
          <ComboBoxItem Content="Default icon" />
          <ComboBoxItem Content="← Back" />
          <ComboBoxItem Content="Cancel" />
          <ComboBoxItem Content="✓ Done" />
        </ComboBox>

        <Separator />

        <!-- SetHeader -->
        <TextBlock Text="SetHeader" FontWeight="SemiBold" FontSize="13" />
        <TextBlock Text="Sets the page header displayed in the navigation bar. Accepts any string or Control."
                   FontSize="11"
                   Opacity="0.6"
                   TextWrapping="Wrap" />
        <ComboBox x:Name="HeaderCombo"
                  SelectedIndex="0"
                  HorizontalAlignment="Stretch">
          <ComboBoxItem Content="String: page title" />
          <ComboBoxItem Content="Title + Subtitle" />
          <ComboBoxItem Content="Search box" />
          <ComboBoxItem Content="None (hidden)" />
        </ComboBox>

        <Separator />

        <TextBlock Text="Navigation" FontWeight="SemiBold" FontSize="13" />
        <Button Content="Push Page with Above Settings"
                HorizontalAlignment="Stretch"
                Click="OnPush" />
        <Button Content="Pop"
                HorizontalAlignment="Stretch"
                Click="OnPop" />
        <Button Content="Pop to Root"
                HorizontalAlignment="Stretch"
                Click="OnPopToRoot" />

      </StackPanel>
    </ScrollViewer>

    <Border DockPanel.Dock="Right" Width="1" Background="{DynamicResource SystemControlForegroundBaseMediumLowBrush}" />

    <Border Margin="12"
            BorderBrush="{DynamicResource SystemControlForegroundBaseMediumLowBrush}"
            BorderThickness="1"
            CornerRadius="6"
            ClipToBounds="True">
      <NavigationPage x:Name="DemoNav" />
    </Border>
  </DockPanel>
</UserControl>