diff --git a/src/Greenshot.Editor/Forms/ImageEditorForm.cs b/src/Greenshot.Editor/Forms/ImageEditorForm.cs
index ffbea1a8b..e3b65b980 100644
--- a/src/Greenshot.Editor/Forms/ImageEditorForm.cs
+++ b/src/Greenshot.Editor/Forms/ImageEditorForm.cs
@@ -995,7 +995,7 @@ namespace Greenshot.Editor.Forms
                     case Keys.G: // Grayscale Ctrl + G
                         GrayscaleToolStripMenuItemClick(sender, e);
                         break;
-                    case Keys.Delete: // Grayscale Ctrl + Delete
+                    case Keys.Delete: // Clear capture, use transparent background Ctrl + Delete
                         ClearToolStripMenuItemClick(sender, e);
                         break;
                     case Keys.Oemcomma: // Rotate CCW Ctrl + ,
diff --git a/src/Greenshot.Editor/Memento/SurfaceBackgroundChangeMemento.cs b/src/Greenshot.Editor/Memento/SurfaceBackgroundChangeMemento.cs
index 8bb9c229c..71d2e9f36 100644
--- a/src/Greenshot.Editor/Memento/SurfaceBackgroundChangeMemento.cs
+++ b/src/Greenshot.Editor/Memento/SurfaceBackgroundChangeMemento.cs
@@ -39,9 +39,12 @@ namespace Greenshot.Editor.Memento
         {
             _surface = surface;
             _image = surface.Image;
-            _matrix = matrix.Clone();
-            // Make sure the reverse is applied
-            _matrix.Invert();
+            if (matrix != null)
+            {
+                _matrix = matrix.Clone();
+                // Make sure the reverse is applied
+                _matrix.Invert();
+            }
         }
 
         public void Dispose()