diff --git a/MainWindow/MainWindowVM.vb b/MainWindow/MainWindowVM.vb
index ef19176..3e19c3f 100644
--- a/MainWindow/MainWindowVM.vb
+++ b/MainWindow/MainWindowVM.vb
@@ -597,10 +597,14 @@ Public Class MainWindowVM
          ' pulisco output
          Map.refStatusBarVM.NotifyStatusOutput("")
          Map.refInputExpanderVM.ResetInputBox()
+         ' Nascondo la combobox delle usernotes
+         Map.refMachiningParameterExpanderVM.CurrOperation.SetComboAddVisibility(Visibility.Collapsed)
+         'riattivo il pulsante per visualizzare la combobox delle note
+         Map.refMachiningParameterExpanderVM.CurrOperation.SetShowNoteListCombo_IsEnable(True)
       ElseIf e.Key = Key.Left OrElse e.Key = Key.Right OrElse e.Key = Key.Up OrElse e.Key = Key.Down AndAlso
              Map.refTopCommandBarVM.MachiningIsChecked AndAlso Map.refOperationParametersExpanderVM.OperationParameters.IsEnabled Then
          Map.refMachiningParameterExpanderVM.FocusSlider()
-         Dim nStep As Integer = If( e.Key = Key.Right OrElse e.Key = Key.Up, 1, -1)
+         Dim nStep As Integer = If(e.Key = Key.Right OrElse e.Key = Key.Up, 1, -1)
          Map.refMachiningParameterExpanderVM.SetSliderValue(nStep)
          e.Handled = True
       End If