diff --git a/Terminal.Gui/Resources/config.json b/Terminal.Gui/Resources/config.json
index e3c1ac3dd..e4806af9b 100644
--- a/Terminal.Gui/Resources/config.json
+++ b/Terminal.Gui/Resources/config.json
@@ -29,8 +29,9 @@
         "Dialog.DefaultButtonAlignmentModes": "AddSpaceBetweenItems",
         "FrameView.DefaultBorderStyle": "Single",
         "Window.DefaultBorderStyle": "Single",
-        "Dialog.DefaultBorderStyle": "Single",
-        "MessageBox.DefaultBorderStyle": "Double",
+        "Dialog.DefaultBorderStyle": "Heavy",
+        "MessageBox.DefaultButtonAlignment": "Center",
+        "MessageBox.DefaultBorderStyle": "Heavy",
         "Button.DefaultShadow": "None",
         "ColorSchemes": [
           {
diff --git a/Terminal.Gui/Views/Dialog.cs b/Terminal.Gui/Views/Dialog.cs
index 7b4da9355..c1f18e8fb 100644
--- a/Terminal.Gui/Views/Dialog.cs
+++ b/Terminal.Gui/Views/Dialog.cs
@@ -20,7 +20,7 @@ public class Dialog : Window
     /// <remarks>This property can be set in a Theme.</remarks>
     [SerializableConfigurationProperty (Scope = typeof (ThemeScope))]
     [JsonConverter (typeof (JsonStringEnumConverter<Alignment>))]
-    public static Alignment DefaultButtonAlignment { get; set; } = Alignment.End;
+    public static Alignment DefaultButtonAlignment { get; set; } = Alignment.End; // Default is set in config.json
 
     /// <summary>The default <see cref="Alignment"/> for <see cref="Dialog"/>.</summary>
     /// <remarks>This property can be set in a Theme.</remarks>
@@ -48,7 +48,7 @@ public class Dialog : Window
     /// </summary>
     [SerializableConfigurationProperty (Scope = typeof (ThemeScope))]
     [JsonConverter (typeof (JsonStringEnumConverter<ShadowStyle>))]
-    public new static ShadowStyle DefaultShadow { get; set; } = ShadowStyle.None;
+    public new static ShadowStyle DefaultShadow { get; set; } = ShadowStyle.None; // Default is set in config.json
 
     /// <summary>
     ///     Defines the default border styling for <see cref="Dialog"/>. Can be configured via
@@ -57,7 +57,7 @@ public class Dialog : Window
 
     [SerializableConfigurationProperty (Scope = typeof (ThemeScope))]
     [JsonConverter (typeof (JsonStringEnumConverter<LineStyle>))]
-    public new static LineStyle DefaultBorderStyle { get; set; } = LineStyle.Single;
+    public new static LineStyle DefaultBorderStyle { get; set; } = LineStyle.Single; // Default is set in config.json
 
     private readonly List<Button> _buttons = new ();
 
diff --git a/Terminal.Gui/Views/MessageBox.cs b/Terminal.Gui/Views/MessageBox.cs
index 03339a957..575924e57 100644
--- a/Terminal.Gui/Views/MessageBox.cs
+++ b/Terminal.Gui/Views/MessageBox.cs
@@ -33,7 +33,13 @@ public static class MessageBox
     /// </summary>
     [SerializableConfigurationProperty (Scope = typeof (ThemeScope))]
     [JsonConverter (typeof (JsonStringEnumConverter<LineStyle>))]
-    public static LineStyle DefaultBorderStyle { get; set; } = LineStyle.Single;
+    public static LineStyle DefaultBorderStyle { get; set; } = LineStyle.Single; // Default is set in config.json
+
+    /// <summary>The default <see cref="Alignment"/> for <see cref="Dialog"/>.</summary>
+    /// <remarks>This property can be set in a Theme.</remarks>
+    [SerializableConfigurationProperty (Scope = typeof (ThemeScope))]
+    [JsonConverter (typeof (JsonStringEnumConverter<Alignment>))]
+    public static Alignment DefaultButtonAlignment { get; set; } = Alignment.Center; // Default is set in config.json
 
     /// <summary>
     ///     Defines the default minimum MessageBox width, as a percentage of the screen width. Can be configured via
@@ -365,10 +371,10 @@ public static class MessageBox
         var d = new Dialog
         {
             Title = title,
-            Buttons = buttonList.ToArray (),
-            ButtonAlignment = Alignment.Center,
+            ButtonAlignment = MessageBox.DefaultButtonAlignment,
             ButtonAlignmentModes = AlignmentModes.StartToEnd | AlignmentModes.AddSpaceBetweenItems,
             BorderStyle = MessageBox.DefaultBorderStyle,
+            Buttons = buttonList.ToArray (),
         };
 
         d.Width = Dim.Auto (DimAutoStyle.Auto,