diff --git a/I18N Commander/UI WinForms/Components/TextElements.cs b/I18N Commander/UI WinForms/Components/TextElements.cs
index 902f570..2a4b1ef 100644
--- a/I18N Commander/UI WinForms/Components/TextElements.cs	
+++ b/I18N Commander/UI WinForms/Components/TextElements.cs	
@@ -249,5 +249,13 @@ public partial class TextElements : UserControl
             return;
         
         Clipboard.SetText(await TextElementProcessor.GetKey(this.currentTextElement.Id));
+        
+        //
+        // Switch the button's icon to the "ok" icon for a few
+        // seconds, to indicate, that the key was copied:
+        //
+        this.buttonCopyKey.Image = Icons.icons8_ok_512;
+        await Task.Delay(TimeSpan.FromSeconds(1));
+        this.buttonCopyKey.Image = Icons.icons8_key2_512;
     }
 }
\ No newline at end of file