diff --git a/demo/Ursa.Demo/Pages/DialogDemo.axaml b/demo/Ursa.Demo/Pages/DialogDemo.axaml
index d188caa..7981a93 100644
--- a/demo/Ursa.Demo/Pages/DialogDemo.axaml
+++ b/demo/Ursa.Demo/Pages/DialogDemo.axaml
@@ -39,12 +39,17 @@
                         IsChecked="{Binding CanLightDismiss}"
                         OffContent="No"
                         OnContent="Yes" />
+                    <ToggleSwitch
+                        Content="FullScreen"
+                        IsChecked="{Binding FullScreen}"
+                        OffContent="No"
+                        OnContent="Yes" />
                     <StackPanel Orientation="Horizontal">
-                        <TextBlock Text="Buttons" VerticalAlignment="Center" />
+                        <TextBlock VerticalAlignment="Center" Text="Buttons" />
                         <u:EnumSelector EnumType="{x:Type u:DialogButton}" Value="{Binding SelectedButton}" />
                     </StackPanel>
                     <StackPanel Orientation="Horizontal">
-                        <TextBlock Text="Mode" VerticalAlignment="Center" />
+                        <TextBlock VerticalAlignment="Center" Text="Mode" />
                         <u:EnumSelector EnumType="{x:Type u:DialogMode}" Value="{Binding SelectedMode}" />
                     </StackPanel>
                     <Button Command="{Binding ShowDialogCommand}" Content="Show Dialog" />
@@ -83,6 +88,11 @@
                         IsChecked="{Binding CanLightDismiss}"
                         OffContent="No"
                         OnContent="Yes" />
+                    <ToggleSwitch
+                        Content="FullScreen"
+                        IsChecked="{Binding FullScreen}"
+                        OffContent="No"
+                        OnContent="Yes" />
                     <Button Command="{Binding ShowCustomDialogCommand}" Content="Show Dialog" />
                     <TextBlock>
                         <Run Text="Custom Result: " />
diff --git a/demo/Ursa.Demo/ViewModels/DialogDemoViewModel.cs b/demo/Ursa.Demo/ViewModels/DialogDemoViewModel.cs
index 4301330..2b3d146 100644
--- a/demo/Ursa.Demo/ViewModels/DialogDemoViewModel.cs
+++ b/demo/Ursa.Demo/ViewModels/DialogDemoViewModel.cs
@@ -25,6 +25,7 @@ public partial class DialogDemoViewModel: ObservableObject
     [ObservableProperty] private DialogResult? _defaultResult;
     [ObservableProperty] private bool _result;
     [ObservableProperty] private DateTime? _date;
+    [ObservableProperty] private bool _fullScreen;
     
     public DialogDemoViewModel()
     {
@@ -65,6 +66,7 @@ public partial class DialogDemoViewModel: ObservableObject
                         HorizontalOffset = 50,
                         VerticalAnchor = VerticalPosition.Top,
                         VerticalOffset = 50,
+                        FullScreen = FullScreen,
                     }
                 );
                 Date = vm.Date;
@@ -80,6 +82,7 @@ public partial class DialogDemoViewModel: ObservableObject
                         Mode = SelectedMode,
                         Buttons = SelectedButton,
                         CanLightDismiss = CanLightDismiss,
+                        FullScreen = FullScreen,
                     });
             }
         }
@@ -111,6 +114,7 @@ public partial class DialogDemoViewModel: ObservableObject
                     vm, IsGlobal ? null : "LocalHost", options: new OverlayDialogOptions()
                     {
                         CanLightDismiss = CanLightDismiss,
+                        FullScreen = FullScreen,
                     });
                 Date = vm.Date;
             }
@@ -118,7 +122,7 @@ public partial class DialogDemoViewModel: ObservableObject
             {
                 OverlayDialog.ShowCustom<DialogWithAction, DialogWithActionViewModel>(new DialogWithActionViewModel(),
                     IsGlobal ? null : "LocalHost",
-                    options: new OverlayDialogOptions{ CanLightDismiss = CanLightDismiss });
+                    options: new OverlayDialogOptions{ CanLightDismiss = CanLightDismiss, FullScreen = FullScreen});
             }
         }
         
diff --git a/src/Ursa.Themes.Semi/Controls/Dialog.axaml b/src/Ursa.Themes.Semi/Controls/Dialog.axaml
index b7344a5..6060c01 100644
--- a/src/Ursa.Themes.Semi/Controls/Dialog.axaml
+++ b/src/Ursa.Themes.Semi/Controls/Dialog.axaml
@@ -18,7 +18,7 @@
         <Setter Property="Template">
             <ControlTemplate TargetType="u:CustomDialogControl">
                 <Border
-                    Margin="8"
+                    Name="PART_Border"
                     Padding="0"
                     HorizontalAlignment="Center"
                     VerticalAlignment="Center"
@@ -52,8 +52,15 @@
                 </Border>
             </ControlTemplate>
         </Setter>
-        <Style Selector="^[IsClosed=True]">
-            <Setter Property="RenderTransform" Value="scale(0.95)"/>
+        <Style Selector="^:full-screen">
+            <Setter Property="CornerRadius" Value="0"/>
+            <Style Selector="^ /template/ Border#PART_Border">
+                <Setter Property="HorizontalAlignment" Value="Stretch"/>
+                <Setter Property="VerticalAlignment" Value="Stretch"/>
+                <Setter Property="Theme" Value="{x:Null}"/>
+                <Setter Property="Margin" Value="0"/>
+                <Setter Property="Background" Value="{DynamicResource BorderCardBackground}"></Setter>
+            </Style>
         </Style>
         <Style Selector="^ /template/ Panel#PART_TitleArea">
             <Setter Property="ContextFlyout">
@@ -143,10 +150,10 @@
         <Setter Property="Template">
             <ControlTemplate TargetType="u:DefaultDialogControl">
                 <Border
-                    Margin="10"
+                    Name="PART_Border"
                     Padding="0"
-                    HorizontalAlignment="Center"
-                    VerticalAlignment="Center"
+                    HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
+                    VerticalAlignment="{TemplateBinding VerticalAlignment}"
                     BoxShadow="0 0 8 0 #1A000000"
                     Classes="Shadow"
                     ClipToBounds="False"
@@ -159,6 +166,8 @@
                                 <ContentPresenter
                                     Name="PART_ContentPresenter"
                                     Grid.Row="1"
+                                    HorizontalAlignment="Center"
+                                    VerticalAlignment="Center"
                                     Margin="24,8"
                                     Content="{TemplateBinding Content}" />
                             </ScrollViewer>
@@ -228,8 +237,15 @@
                 </Border>
             </ControlTemplate>
         </Setter>
-        <Style Selector="^[IsClosed=True]">
-            <Setter Property="RenderTransform" Value="scale(0.95)"/>
+        <Style Selector="^:full-screen">
+            <Setter Property="CornerRadius" Value="0"/>
+        </Style>
+        <Style Selector="^:full-screen /template/ Border#PART_Border">
+            <Setter Property="HorizontalAlignment" Value="Stretch"/>
+            <Setter Property="VerticalAlignment" Value="Stretch"/>
+            <Setter Property="Theme" Value="{x:Null}"/>
+            <Setter Property="Margin" Value="0"></Setter>
+            <Setter Property="Background" Value="{DynamicResource BorderCardBackground}"></Setter>
         </Style>
         <Style Selector="^[Mode=None]">
             <Style Selector="^ /template/ PathIcon#PART_Icon">
diff --git a/src/Ursa/Controls/Dialog/DialogControlBase.cs b/src/Ursa/Controls/Dialog/DialogControlBase.cs
index bcead7b..e057f9c 100644
--- a/src/Ursa/Controls/Dialog/DialogControlBase.cs
+++ b/src/Ursa/Controls/Dialog/DialogControlBase.cs
@@ -14,12 +14,13 @@ namespace Ursa.Controls;
 
 [TemplatePart(PART_CloseButton, typeof(Button))]
 [TemplatePart(PART_TitleArea, typeof(Panel))]
-[PseudoClasses(PC_Modal)]
+[PseudoClasses(PC_Modal, PC_FullScreen)]
 public abstract class DialogControlBase : OverlayFeedbackElement
 {
     public const string PART_CloseButton = "PART_CloseButton";
     public const string PART_TitleArea = "PART_TitleArea";
     public const string PC_Modal = ":modal";
+    public const string PC_FullScreen = ":full-screen";
 
     internal HorizontalPosition HorizontalAnchor { get; set; } = HorizontalPosition.Center;
     internal VerticalPosition VerticalAnchor { get; set; } = VerticalPosition.Center;
@@ -31,6 +32,17 @@ public abstract class DialogControlBase : OverlayFeedbackElement
     internal double? VerticalOffsetRatio { get; set; }
     internal bool CanLightDismiss { get; set; }
 
+    private bool _isFullScreen;
+
+    public static readonly DirectProperty<DialogControlBase, bool> IsFullScreenProperty = AvaloniaProperty.RegisterDirect<DialogControlBase, bool>(
+        nameof(IsFullScreen), o => o.IsFullScreen, (o, v) => o.IsFullScreen = v);
+
+    public bool IsFullScreen
+    {
+        get => _isFullScreen;
+        set => SetAndRaise(IsFullScreenProperty, ref _isFullScreen, value);
+    }
+
     protected internal Button? _closeButton;
     private Panel? _titleArea;
 
@@ -133,6 +145,7 @@ public abstract class DialogControlBase : OverlayFeedbackElement
     {
         CanDragMoveProperty.Changed.AddClassHandler<InputElement, bool>(OnCanDragMoveChanged);
         CanCloseProperty.Changed.AddClassHandler<InputElement, bool>(OnCanCloseChanged);
+        IsFullScreenProperty.AffectsPseudoClass<DialogControlBase>(PC_FullScreen);
     }
 
 
diff --git a/src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs b/src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs
index f58ea2a..7ac073e 100644
--- a/src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs
+++ b/src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs
@@ -17,6 +17,7 @@ public enum VerticalPosition
 public class OverlayDialogOptions
 {
     internal static OverlayDialogOptions Default { get; } = new OverlayDialogOptions();
+    public bool FullScreen { get; set; }
     public HorizontalPosition HorizontalAnchor { get; set; } = HorizontalPosition.Center;
     public VerticalPosition VerticalAnchor { get; set; } = VerticalPosition.Center;
     /// <summary>
diff --git a/src/Ursa/Controls/Dialog/OverlayDialog.cs b/src/Ursa/Controls/Dialog/OverlayDialog.cs
index 5d750a3..7d57525 100644
--- a/src/Ursa/Controls/Dialog/OverlayDialog.cs
+++ b/src/Ursa/Controls/Dialog/OverlayDialog.cs
@@ -1,5 +1,6 @@
 using Avalonia;
 using Avalonia.Controls;
+using Avalonia.Layout;
 using Ursa.Common;
 
 namespace Ursa.Controls;
@@ -181,6 +182,12 @@ public static class OverlayDialog
     private static void ConfigureCustomDialogControl(CustomDialogControl control, OverlayDialogOptions? options)
     {
         options ??= OverlayDialogOptions.Default;
+        control.IsFullScreen = options.FullScreen;
+        if (options.FullScreen)
+        {
+            control.HorizontalAlignment = HorizontalAlignment.Stretch;
+            control.VerticalAlignment = VerticalAlignment.Stretch;
+        }
         control.HorizontalAnchor = options.HorizontalAnchor;
         control.VerticalAnchor = options.VerticalAnchor;
         control.ActualHorizontalAnchor = options.HorizontalAnchor;
@@ -197,6 +204,12 @@ public static class OverlayDialog
     private static void ConfigureDefaultDialogControl(DefaultDialogControl control, OverlayDialogOptions? options)
     {
         if (options is null) options = new OverlayDialogOptions();
+        control.IsFullScreen = options.FullScreen;
+        if (options.FullScreen)
+        {
+            control.HorizontalAlignment = HorizontalAlignment.Stretch;
+            control.VerticalAlignment = VerticalAlignment.Stretch;
+        }
         control.HorizontalAnchor = options.HorizontalAnchor;
         control.VerticalAnchor = options.VerticalAnchor;
         control.ActualHorizontalAnchor = options.HorizontalAnchor;
diff --git a/src/Ursa/Controls/OverlayShared/OverlayDialogHost.Dialog.cs b/src/Ursa/Controls/OverlayShared/OverlayDialogHost.Dialog.cs
index baa9139..11e7d09 100644
--- a/src/Ursa/Controls/OverlayShared/OverlayDialogHost.Dialog.cs
+++ b/src/Ursa/Controls/OverlayShared/OverlayDialogHost.Dialog.cs
@@ -133,6 +133,11 @@ public partial class OverlayDialogHost
         ResetZIndices();
         this.Children.Add(mask);
         this.Children.Add(control);
+        if (control.IsFullScreen)
+        {
+            control.Width = Bounds.Width;
+            control.Height = Bounds.Height;
+        }
         control.Measure(this.Bounds.Size);
         control.Arrange(new Rect(control.DesiredSize));
         SetToPosition(control);