diff --git a/demo/Ursa.Demo.Browser/Assets/SourceHanSansCN-Regular.otf b/demo/Ursa.Demo.Browser/Assets/SourceHanSansCN-Regular.otf
new file mode 100644
index 00000000..c13789be
Binary files /dev/null and b/demo/Ursa.Demo.Browser/Assets/SourceHanSansCN-Regular.otf differ
diff --git a/demo/Ursa.Demo.Browser/AvaloniaAppBuilderExtensions.cs b/demo/Ursa.Demo.Browser/AvaloniaAppBuilderExtensions.cs
new file mode 100644
index 00000000..eb3c4b76
--- /dev/null
+++ b/demo/Ursa.Demo.Browser/AvaloniaAppBuilderExtensions.cs
@@ -0,0 +1,16 @@
+using Avalonia;
+using Avalonia.Media;
+
+namespace Ursa.Demo.Browser;
+
+public static class AvaloniaAppBuilderExtensions
+{
+    private static string DefaultFontFamily => "avares://Ursa.Demo.Browser/Assets#Source Han Sans CN";
+
+    public static AppBuilder WithSourceHanSansCNFont(this AppBuilder builder) =>
+        builder.With(new FontManagerOptions
+        {
+            DefaultFamilyName = DefaultFontFamily,
+            FontFallbacks = new[] { new FontFallback { FontFamily = new FontFamily(DefaultFontFamily) } }
+        });
+}
\ No newline at end of file
diff --git a/demo/Ursa.Demo.Browser/Program.cs b/demo/Ursa.Demo.Browser/Program.cs
index f6656416..5c9ef40e 100644
--- a/demo/Ursa.Demo.Browser/Program.cs
+++ b/demo/Ursa.Demo.Browser/Program.cs
@@ -10,6 +10,7 @@ namespace Ursa.Demo.Browser;
 internal sealed partial class Program
 {
     private static Task Main(string[] args) => BuildAvaloniaApp()
+        .WithSourceHanSansCNFont()
         .StartBrowserAppAsync("out");
 
     public static AppBuilder BuildAvaloniaApp()
diff --git a/demo/Ursa.Demo.Browser/Ursa.Demo.Browser.csproj b/demo/Ursa.Demo.Browser/Ursa.Demo.Browser.csproj
index 0b2c8c45..df3278d5 100644
--- a/demo/Ursa.Demo.Browser/Ursa.Demo.Browser.csproj
+++ b/demo/Ursa.Demo.Browser/Ursa.Demo.Browser.csproj
@@ -13,6 +13,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <AvaloniaResource Include="Assets\**"/>
         <TrimmerRootDescriptor Include="linker.xml"/>
     </ItemGroup>
 </Project>
diff --git a/demo/Ursa.Demo/Views/SingleView.axaml b/demo/Ursa.Demo/Views/SingleView.axaml
index 20659738..3539f1a0 100644
--- a/demo/Ursa.Demo/Views/SingleView.axaml
+++ b/demo/Ursa.Demo/Views/SingleView.axaml
@@ -7,8 +7,9 @@
              mc:Ignorable="d" d:DesignWidth="800"
              d:DesignHeight="450"
              x:Class="Ursa.Demo.Views.SingleView">
-    <Panel>
-        <views:MainView/>
-        <u:OverlayDialogHost/>
-    </Panel>
+    <Grid RowDefinitions="Auto, *">
+        <u:ThemeToggleButton Grid.Row="0" HorizontalAlignment="Right" Margin="8"></u:ThemeToggleButton>
+        <views:MainView Grid.Row="1"/>
+        <u:OverlayDialogHost Grid.Row="0" Grid.RowSpan="2"/>
+    </Grid>
 </UserControl>