diff --git a/Terminal.Gui/View/Adornment/Adornment.cs b/Terminal.Gui/View/Adornment/Adornment.cs
index addb02f2e..46401dbca 100644
--- a/Terminal.Gui/View/Adornment/Adornment.cs
+++ b/Terminal.Gui/View/Adornment/Adornment.cs
@@ -91,7 +91,7 @@ public class Adornment : View
     public override View SuperView
     {
         get => null;
-        set => throw new NotImplementedException ();
+        set => throw new InvalidOperationException (@"Adornments can not be Subviews or have SuperViews. Use Parent instead.");
     }
 
     //internal override Adornment CreateAdornment (Type adornmentType)
@@ -109,10 +109,14 @@ public class Adornment : View
     ///     Gets the rectangle that describes the area of the Adornment. The Location is always (0,0).
     ///     The size is the size of the <see cref="View.Frame"/>.
     /// </summary>
+    /// <remarks>
+    ///     The Viewport of an Adornment cannot be modified. Attempting to set this property will throw an
+    ///     <see cref="InvalidOperationException"/>.
+    /// </remarks>
     public override Rectangle Viewport
     {
         get => Frame with { Location = Point.Empty };
-        set => throw new InvalidOperationException ("It makes no sense to set Viewport of a Thickness.");
+        set => throw new InvalidOperationException (@"The Viewport of an Adornment cannot be modified.");
     }
 
     /// <inheritdoc/>
@@ -183,8 +187,8 @@ public class Adornment : View
     /// </summary>
     public override bool SuperViewRendersLineCanvas
     {
-        get => false; // throw new NotImplementedException ();
-        set => throw new NotImplementedException ();
+        get => false; 
+        set => throw new InvalidOperationException (@"Adornment can only render to their Parent or Parent's Superview.");
     }
 
     #endregion View Overrides
diff --git a/UnitTests/View/Adornment/AdornmentTests.cs b/UnitTests/View/Adornment/AdornmentTests.cs
index 7010a2bc4..9979702ff 100644
--- a/UnitTests/View/Adornment/AdornmentTests.cs
+++ b/UnitTests/View/Adornment/AdornmentTests.cs
@@ -24,7 +24,7 @@ public class AdornmentTests (ITestOutputHelper output)
         Assert.Equal (new (0, 0, 20, 20), view.Viewport);
 
         var marginThickness = 1;
-        view.Margin.Thickness = new  (marginThickness);
+        view.Margin.Thickness = new (marginThickness);
         Assert.Equal (new (0, 0, 18, 18), view.Viewport);
 
         var borderThickness = 2;
@@ -39,7 +39,7 @@ public class AdornmentTests (ITestOutputHelper output)
 
         Assert.Equal (new (0, 0, view.Border.Frame.Width, view.Border.Frame.Height), view.Border.Viewport);
 
-        Assert.Equal (new (0, 0, view.Padding.Frame.Width , view.Padding.Frame.Height), view.Padding.Viewport);
+        Assert.Equal (new (0, 0, view.Padding.Frame.Width, view.Padding.Frame.Height), view.Padding.Viewport);
     }
 
     // Test that Adornment.Viewport_get override returns Frame.Size minus Thickness
@@ -291,14 +291,14 @@ public class AdornmentTests (ITestOutputHelper output)
     public void Setting_SuperView_Throws ()
     {
         var adornment = new Adornment (null);
-        Assert.Throws<NotImplementedException> (() => adornment.SuperView = new View ());
+        Assert.Throws<InvalidOperationException> (() => adornment.SuperView = new View ());
     }
 
     [Fact]
     public void Setting_SuperViewRendersLineCanvas_Throws ()
     {
         var adornment = new Adornment (null);
-        Assert.Throws<NotImplementedException> (() => adornment.SuperViewRendersLineCanvas = true);
+        Assert.Throws<InvalidOperationException> (() => adornment.SuperViewRendersLineCanvas = true);
     }
 
     [Fact]
@@ -340,8 +340,8 @@ public class AdornmentTests (ITestOutputHelper output)
     {
         var view = new View ();
         var raised = false;
-        view.BeginInit();
-        view.EndInit();
+        view.BeginInit ();
+        view.EndInit ();
 
         view.LayoutStarted += LayoutStarted;
         view.Margin.Thickness = new Thickness (1, 2, 3, 4);
@@ -373,4 +373,15 @@ public class AdornmentTests (ITestOutputHelper output)
             raised = true;
         }
     }
+
+    [Fact]
+    public void Set_Viewport_Throws ()
+    {
+        View view = new ();
+
+        view.BeginInit ();
+        view.EndInit ();
+        view.Padding.Thickness = new (2, 2, 2, 2);
+        Assert.Throws<InvalidOperationException> (() => view.Padding.Viewport = view.Padding.Viewport with { Location = new (1, 1) });
+    }
 }
diff --git a/UnitTests/View/Adornment/ToScreenTests.cs b/UnitTests/View/Adornment/ToScreenTests.cs
index 4a550f7c7..ca8895724 100644
--- a/UnitTests/View/Adornment/ToScreenTests.cs
+++ b/UnitTests/View/Adornment/ToScreenTests.cs
@@ -234,14 +234,14 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         Assert.Equal (expectedX + view.Margin.Thickness.Left + view.Border.Thickness.Left, paddingScreen.X);
     }
 
-
+    // Adornment.ViewportToScreen tests ============================
 
     [Theory]
     [InlineData (0, 0, 0)]
     [InlineData (1, 0, 1)]
     [InlineData (-1, 0, -1)]
     [InlineData (11, 0, 11)]
-    public void BoundsToScreen_NoSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_NoSuperView_WithoutAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -251,9 +251,9 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         view.Frame = frame;
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
@@ -276,7 +276,7 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
     [InlineData (1, -1, 0)]
     [InlineData (-1, -1, -2)]
     [InlineData (11, -1, 10)]
-    public void BoundsToScreen_NoSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_NoSuperView_WithAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -292,9 +292,9 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         Assert.Equal(4, view.Viewport.Width);
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
@@ -317,7 +317,7 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
     [InlineData (1, -1, 0)]
     [InlineData (-1, -1, -2)]
     [InlineData (11, -1, 10)]
-    public void BoundsToScreen_SuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_SuperView_WithoutAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -338,9 +338,9 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         superView.LayoutSubviews ();
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
@@ -363,7 +363,7 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
     [InlineData (1, -1, 1)]
     [InlineData (-1, -1, -1)]
     [InlineData (11, -1, 11)]
-    public void BoundsToScreen_SuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_SuperView_WithAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -385,9 +385,9 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         superView.LayoutSubviews ();
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
@@ -410,7 +410,7 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
     [InlineData (1, -1, 0)]
     [InlineData (-1, -1, -2)]
     [InlineData (11, -1, 10)]
-    public void BoundsToScreen_NestedSuperView_WithoutAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_NestedSuperView_WithoutAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -441,9 +441,9 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         superView.LayoutSubviews ();
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
@@ -466,7 +466,7 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
     [InlineData (1, -1, 6)]
     [InlineData (-1, -1, 4)]
     [InlineData (11, -1, 16)]
-    public void BoundsToScreen_NestedSuperView_WithAdornments (int frameX, int boundsX, int expectedX)
+    public void ViewportToScreen_NestedSuperView_WithAdornments (int frameX, int testX, int expectedX)
     {
         // We test with only X because Y is equivalent. Height/Width are irrelevant.
         // Arrange
@@ -502,14 +502,13 @@ public class AdornmentToScreenTests (ITestOutputHelper output)
         superView.LayoutSubviews ();
 
         // Act
-        var marginScreen = view.Margin.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var borderScreen = view.Border.ViewportToScreen (new (boundsX, 0, 0, 0));
-        var paddingScreen = view.Padding.ViewportToScreen (new (boundsX, 0, 0, 0));
+        var marginScreen = view.Margin.ViewportToScreen (new (testX, 0, 0, 0));
+        var borderScreen = view.Border.ViewportToScreen (new (testX, 0, 0, 0));
+        var paddingScreen = view.Padding.ViewportToScreen (new (testX, 0, 0, 0));
 
         // Assert
         Assert.Equal (expectedX, marginScreen.X);
         Assert.Equal (expectedX + view.Margin.Thickness.Left, borderScreen.X);
         Assert.Equal (expectedX + view.Margin.Thickness.Left + view.Border.Thickness.Left, paddingScreen.X);
     }
-
 }
diff --git a/UnitTests/View/Layout/ToScreenTests.cs b/UnitTests/View/Layout/ToScreenTests.cs
index 7b7df328f..559993607 100644
--- a/UnitTests/View/Layout/ToScreenTests.cs
+++ b/UnitTests/View/Layout/ToScreenTests.cs
@@ -507,4 +507,60 @@ public class ToScreenTests (ITestOutputHelper output)
         Assert.Equal (expectedX, screen.X);
     }
 
+
+    [Theory]
+    [InlineData (0, 0, 3)]
+    [InlineData (1, 0, 4)]
+    [InlineData (-1, 0, 2)]
+    [InlineData (11, 0, 14)]
+
+    [InlineData (0, 1, 4)]
+    [InlineData (1, 1, 5)]
+    [InlineData (-1, 1, 3)]
+    [InlineData (11, 1, 15)]
+
+    [InlineData (0, -1, 2)]
+    [InlineData (1, -1, 3)]
+    [InlineData (-1, -1, 1)]
+    [InlineData (11, -1, 13)]
+    public void ViewportToScreen_Positive_NestedSuperView_WithAdornments (int frameX, int testX, int expectedX)
+    {
+        // We test with only X because Y is equivalent. Height/Width are irrelevant.
+        // Arrange
+        var frame = new Rectangle (frameX, 0, 10, 10);
+
+        var superSuperView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+        superSuperView.BorderStyle = LineStyle.Single;
+
+        var superView = new View ()
+        {
+            X = 0,
+            Y = 0,
+            Height = Dim.Fill (),
+            Width = Dim.Fill ()
+        };
+
+        superSuperView.Add (superView);
+        superView.BorderStyle = LineStyle.Single;
+
+        var view = new View ();
+        view.Frame = frame;
+        view.ContentSize = new (11, 11);
+        view.Viewport = view.Viewport with { Location = new (1, 1) };
+
+        superView.Add (view);
+        superView.LayoutSubviews ();
+
+        // Act
+        var screen = view.ViewportToScreen (new (testX, 0, 0, 0));
+
+        // Assert
+        Assert.Equal (expectedX, screen.X);
+    }
 }