diff --git a/PROMS/Volian.Controls.Library/StepRTB.cs b/PROMS/Volian.Controls.Library/StepRTB.cs
index 306286d6..909fb90f 100644
--- a/PROMS/Volian.Controls.Library/StepRTB.cs
+++ b/PROMS/Volian.Controls.Library/StepRTB.cs
@@ -1818,13 +1818,15 @@ namespace Volian.Controls.Library
 				IsControlChar = true;
 				if (e.Shift)
 				{
+					//Console.WriteLine("keycode =  {0}  key value = {1}",e.KeyCode,e.KeyValue);
 					switch (e.KeyCode)
 					{
 						// The following keys are supported in underlying RTB (with ctrl+shift key), 
 						// but PROMS should not do anything for that functionality:
-						case Keys.Add:
+						case Keys.Add: // the plus on the key pad
 						case Keys.Subtract:
 						case Keys.L:
+						case Keys.Oemplus: // the plus on the keyboard (not the key pad)
 							e.Handled = true;
 							break;
 					}
@@ -1891,6 +1893,7 @@ namespace Volian.Controls.Library
 						case Keys.D2:	// Double space text
 						case Keys.D5:	// 1.5 space text
 						case Keys.H:	// Find  (proms uses Ctrl+F for find)
+						case Keys.Oemplus: // plus on the keyboard (not the key pad)
 							e.Handled = true;
 							break;
 					}