diff --git a/Icarus/LeftPanel/LeftPanelVM.vb b/Icarus/LeftPanel/LeftPanelVM.vb
index a5d8932..3ac65ca 100644
--- a/Icarus/LeftPanel/LeftPanelVM.vb
+++ b/Icarus/LeftPanel/LeftPanelVM.vb
@@ -55,9 +55,7 @@ Public Class LeftPanelVM
          Case Panels.SHELLNUMBER
             Map.refShellNumberPanelVM.Init()
       End Select
-      If Not m_SelPanel = Panels.NULL Then
-         Map.refViewLayerManagerVM.UpdateForced()
-      End If
+      Map.refViewLayerManagerVM.UpdateForced()
       NotifyPropertyChanged(NameOf(SelPanel))
    End Sub
 
diff --git a/Icarus/SliceManager/SliceManagerV.xaml b/Icarus/SliceManager/SliceManagerV.xaml
index 528cf04..ebcf538 100644
--- a/Icarus/SliceManager/SliceManagerV.xaml
+++ b/Icarus/SliceManager/SliceManagerV.xaml
@@ -42,18 +42,22 @@
             <Button Content="Slice"
                     Command="{Binding Slice_Command}"
                     Style="{StaticResource ToolBar_TextButton}"
+                    IsEnabled="{Binding Buttons_IsEnabled}"
                     Visibility="{Binding ModifyMode_Visibility}"/>
             <Button Content="Generate"
                     Command="{Binding Generate_Command}"
                     Style="{StaticResource ToolBar_TextButton}"
+                    IsEnabled="{Binding Buttons_IsEnabled}"
                     Visibility="{Binding SliceMode_Visibility}"/>
             <Button Content="Simulate"
                     Command="{Binding Simulate_Command}"
                     Style="{StaticResource ToolBar_TextButton}"
+                    IsEnabled="{Binding Buttons_IsEnabled}"
                     Visibility="{Binding SliceMode_Visibility}"/>
             <Button Content="Exit"
                     Command="{Binding Exit_Command}"
                     Style="{StaticResource ToolBar_TextButton}"
+                    IsEnabled="{Binding Buttons_IsEnabled}"
                     Visibility="{Binding SliceMode_Visibility}"/>
          </UniformGrid>
       </Grid>
diff --git a/Icarus/SliceManager/SliceManagerVM.vb b/Icarus/SliceManager/SliceManagerVM.vb
index 74d23ff..8f997ce 100644
--- a/Icarus/SliceManager/SliceManagerVM.vb
+++ b/Icarus/SliceManager/SliceManagerVM.vb
@@ -127,6 +127,17 @@ Public Class SliceManagerVM
       End Get
    End Property
 
+   Private m_Buttons_IsEnabled As Boolean = True
+   Public ReadOnly Property Buttons_IsEnabled As Boolean
+      Get
+         Return m_Buttons_IsEnabled
+      End Get
+   End Property
+   Friend Sub SetButtonsIsEnabled(value As Boolean)
+      m_Buttons_IsEnabled = value
+      NotifyPropertyChanged(NameOf(Buttons_IsEnabled))
+   End Sub
+
    Private m_ModifyMode_Visibility As Visibility = Visibility.Collapsed
    Public ReadOnly Property ModifyMode_Visibility As Visibility
       Get
@@ -276,10 +287,14 @@ Public Class SliceManagerVM
       m_bGenerate = bGenerate
       ' mostro barre di caricamento
       SetLoadingVisibility(True)
-      ' disabilito ProjManager, TopPanel e uscita dal programma
+      ' disabilito ProjManager, TopPanel, TFS, Slider, bottoni e uscita dal programma
       Map.refProjManagerVM.SetProjCmdIsEnabled(False)
       Map.refTopPanelVM.SetTopPanelIsEnabled(False)
       Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(False)
+      Map.refTFSEditorVM.SetTFSEditorIsEnabled(False)
+      Map.refSliderManagerVM.SetLayerIndexIsEnabled(False)
+      Map.refSliderManagerVM.SetLayerAdvancementIsEnabled(False)
+      SetButtonsIsEnabled(False)
       ' verifico se eseguire slice
       Dim bOk As Boolean = True
       Dim bToRecalcSlice As Boolean = False
@@ -363,6 +378,10 @@ Public Class SliceManagerVM
       Map.refProjManagerVM.SetProjCmdIsEnabled(True)
       Map.refTopPanelVM.SetTopPanelIsEnabled(True)
       Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(True)
+      Map.refTFSEditorVM.SetTFSEditorIsEnabled(True)
+      Map.refSliderManagerVM.SetLayerIndexIsEnabled(True)
+      Map.refSliderManagerVM.SetLayerAdvancementIsEnabled(True)
+      SetButtonsIsEnabled(True)
       m_bSlice = False
       m_bCalcTFS = False
       m_bGenerate = False
diff --git a/Icarus/SliderManager/LayerAdvancementSliderV.xaml b/Icarus/SliderManager/LayerAdvancementSliderV.xaml
index f7265b3..91de53b 100644
--- a/Icarus/SliderManager/LayerAdvancementSliderV.xaml
+++ b/Icarus/SliderManager/LayerAdvancementSliderV.xaml
@@ -5,5 +5,7 @@
         Value="{Binding dLayerAdvancement}"
         Minimum="0"
         Maximum="100"
+        SmallChange="1"
+        IsEnabled="{Binding LayerAdvancement_IsEnabled}"
         Visibility="{Binding LayerAdvancement_Visibility}"/>
 
diff --git a/Icarus/SliderManager/LayerIndexSliderV.xaml b/Icarus/SliderManager/LayerIndexSliderV.xaml
index d8bd877..d05e574 100644
--- a/Icarus/SliderManager/LayerIndexSliderV.xaml
+++ b/Icarus/SliderManager/LayerIndexSliderV.xaml
@@ -2,6 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:Icarus="clr-namespace:Icarus"
+             IsEnabled="{Binding LayerIndex_IsEnabled}"
              Visibility="{Binding LayerIndex_Visibility}">
    <Grid VerticalAlignment="Center">
       <Grid.RowDefinitions>
@@ -17,15 +18,16 @@
                 SelectedIndex="{Binding ghSelViewSlider}"
                 Width="100"/>
       <Icarus:ShowValueSlider Grid.Row="3"
-              Orientation="Vertical"
-              Height="400"
-              Value="{Binding nLayerIndex}"
-              Minimum="{Binding nLayerIndex_Minimum}"
-              Maximum="{Binding nLayerIndex_Maximum}"
-              ShowValue="{Binding ghShowValue}"
-              ShowMaximum="{Binding ghShowMaximum}"
-              HorizontalAlignment="Right"
-              Style="{StaticResource LayerIndex_Slider}"/>
+                              Orientation="Vertical"
+                              Height="400"
+                              Value="{Binding nLayerIndex}"
+                              Minimum="{Binding nLayerIndex_Minimum}"
+                              Maximum="{Binding nLayerIndex_Maximum}"
+                              ShowValue="{Binding ghShowValue}"
+                              ShowMaximum="{Binding ghShowMaximum}"
+                              SmallChange="1"
+                              HorizontalAlignment="Right"
+                              Style="{StaticResource LayerIndex_Slider}"/>
    </Grid>
    
 </UserControl>
diff --git a/Icarus/SliderManager/SliderManagerVM.vb b/Icarus/SliderManager/SliderManagerVM.vb
index 02c19db..a768b02 100644
--- a/Icarus/SliderManager/SliderManagerVM.vb
+++ b/Icarus/SliderManager/SliderManagerVM.vb
@@ -229,6 +229,28 @@ Public Class SliderManagerVM
       End Set
    End Property
 
+   Private m_LayerIndex_IsEnabled As Boolean = True
+   Public ReadOnly Property LayerIndex_IsEnabled As Boolean
+      Get
+         Return m_LayerIndex_IsEnabled
+      End Get
+   End Property
+   Friend Sub SetLayerIndexIsEnabled(value As Boolean)
+      m_LayerIndex_IsEnabled = value
+      NotifyPropertyChanged(NameOf(LayerIndex_IsEnabled))
+   End Sub
+
+   Private m_LayerAdvancement_IsEnabled As Boolean = True
+   Public ReadOnly Property LayerAdvancement_IsEnabled As Boolean
+      Get
+         Return m_LayerAdvancement_IsEnabled
+      End Get
+   End Property
+   Friend Sub SetLayerAdvancementIsEnabled(value As Boolean)
+      m_LayerAdvancement_IsEnabled = value
+      NotifyPropertyChanged(NameOf(LayerAdvancement_IsEnabled))
+   End Sub
+
    Private m_nLayerIndex_Minimum As Double
    Public Property nLayerIndex_Minimum As Double
       Get
diff --git a/Icarus/TSFEditor/TFSEditorV.xaml b/Icarus/TSFEditor/TFSEditorV.xaml
index 0eaebd6..b831107 100644
--- a/Icarus/TSFEditor/TFSEditorV.xaml
+++ b/Icarus/TSFEditor/TFSEditorV.xaml
@@ -3,7 +3,8 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:PrintApp="clr-namespace:Icarus"
              MaxHeight="600"
-             Width="{Binding ControlWidth}">
+             Width="{Binding ControlWidth}"
+             IsEnabled="{Binding bTFSEditor_IsEnabled}">
    <Border VerticalAlignment="Center"
            MinHeight="300"
            Style="{StaticResource RightPanel_Border}">
diff --git a/Icarus/TSFEditor/TFSEditorVM.vb b/Icarus/TSFEditor/TFSEditorVM.vb
index 7225e92..98a0fac 100644
--- a/Icarus/TSFEditor/TFSEditorVM.vb
+++ b/Icarus/TSFEditor/TFSEditorVM.vb
@@ -197,6 +197,17 @@ Public Class TFSEditorVM
       End Get
    End Property
 
+   Private m_bTFSEditor_IsEnabled As Boolean = True
+   Public ReadOnly Property bTFSEditor_IsEnabled As Boolean
+      Get
+         Return m_bTFSEditor_IsEnabled
+      End Get
+   End Property
+   Friend Sub SetTFSEditorIsEnabled(bValue As Boolean)
+      m_bTFSEditor_IsEnabled = bValue
+      NotifyPropertyChanged(NameOf(bTFSEditor_IsEnabled))
+   End Sub
+
    ' Definizione comandi
    Private m_cmdSet As ICommand
    Private m_cmdMedia As ICommand
diff --git a/Icarus/TopPanel/TopPanelVM.vb b/Icarus/TopPanel/TopPanelVM.vb
index b48d119..7c5a2dc 100644
--- a/Icarus/TopPanel/TopPanelVM.vb
+++ b/Icarus/TopPanel/TopPanelVM.vb
@@ -92,8 +92,8 @@ Public Class TopPanelVM
             ' imposto pagina di modifica
             SetSelPage(Pages.MODIFY)
          End If
+         m_SelModifyMode = value
          If Not IsNothing(value) AndAlso Map.refTopPanelVM.m_PartList.Count > 0 AndAlso Not IsNothing(Map.refTopPanelVM.SelPart) Then
-            m_SelModifyMode = value
             Dim SelLeftPanel As LeftPanelVM.Panels = LeftPanelVM.Panels.NULL
             Select Case value.ModifyMode
                Case ModifyModes.DISPOSITION
@@ -364,7 +364,8 @@ Public Class TopPanelVM
    End Sub
 
    Private Function ExitMODIFY()
-      Map.refLeftPanelVM.SetSelPanel(LeftPanelVM.Panels.NULL)
+      SetSelModifyMode(ModifyModes.NULL)
+      ' Map.refLeftPanelVM.SetSelPanel(LeftPanelVM.Panels.NULL)
       Return True
    End Function
 
diff --git a/Icarus/ViewLayerManager/ViewLayerManagerVM.vb b/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
index 0da700b..d4108dc 100644
--- a/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
+++ b/Icarus/ViewLayerManager/ViewLayerManagerVM.vb
@@ -140,38 +140,45 @@ Public Class ViewLayer
       ' Disabilito segnalazione modificato
       Dim DisableMgr As New DisableModifiedMgr ' se solidi
       If m_Type = ViewLayerType.SOLID_SLICE Then
-         ' aggiorno parametro di calcolo solidi sui pezzi
-         For Each CurrPart In Map.refTopPanelVM.PartList
-            EgtSetInfo(CurrPart.nPartId, KEY_CALC_SOLIDS, bIsVisible)
-         Next
-         ' lancio calcolo solidi
-         If bIsVisible Then
-            ' mostro barre di caricamento
-            Map.refSliceManagerVM.SetCalcSolid(True)
-            Map.refSliceManagerVM.SetLoadingVisibility(True)
-            ' disabilito ProjManager, TopPanel e uscita dal programma
-            Map.refProjManagerVM.SetProjCmdIsEnabled(False)
-            Map.refTopPanelVM.SetTopPanelIsEnabled(False)
-            Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(False)
-            ExecSolid()
-            ' rileggo i layer con i solidi
+         If Map.refSceneHostVM.MainController.GetStep() = 0 Then
+            ' aggiorno parametro di calcolo solidi sui pezzi
             For Each CurrPart In Map.refTopPanelVM.PartList
-               CurrPart.RefreshPrintLayers()
+               EgtSetInfo(CurrPart.nPartId, KEY_CALC_SOLIDS, bIsVisible)
             Next
-            ' nascondo barre di caricamento
-            Map.refSliceManagerVM.SetCalcSolid(False)
-            Map.refSliceManagerVM.SetLoadingVisibility(False)
-            ' riabilito ProjManager, TopPanel e uscita dal programma
-            Map.refProjManagerVM.SetProjCmdIsEnabled(True)
-            Map.refTopPanelVM.SetTopPanelIsEnabled(True)
-            Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(True)
+            ' lancio calcolo solidi
+            If bIsVisible Then
+               ' mostro barre di caricamento
+               Map.refSliceManagerVM.SetCalcSolid(True)
+               Map.refSliceManagerVM.SetLoadingVisibility(True)
+               ' disabilito ProjManager, TopPanel e uscita dal programma
+               Map.refProjManagerVM.SetProjCmdIsEnabled(False)
+               Map.refTopPanelVM.SetTopPanelIsEnabled(False)
+               Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(False)
+               Map.refTFSEditorVM.SetTFSEditorIsEnabled(False)
+               Map.refSliderManagerVM.SetLayerIndexIsEnabled(False)
+               Map.refSliderManagerVM.SetLayerAdvancementIsEnabled(False)
+               Map.refSliceManagerVM.SetButtonsIsEnabled(False)
+               ExecSolid()
+               ' rileggo i layer con i solidi
+               For Each CurrPart In Map.refTopPanelVM.PartList
+                  CurrPart.RefreshPrintLayers()
+               Next
+               ' nascondo barre di caricamento
+               Map.refSliceManagerVM.SetCalcSolid(False)
+               Map.refSliceManagerVM.SetLoadingVisibility(False)
+               ' riabilito ProjManager, TopPanel e uscita dal programma
+               Map.refProjManagerVM.SetProjCmdIsEnabled(True)
+               Map.refTopPanelVM.SetTopPanelIsEnabled(True)
+               Map.refViewLayerManagerVM.SetViewLayerManagerIsEnabled(True)
+               Map.refTFSEditorVM.SetTFSEditorIsEnabled(True)
+               Map.refSliderManagerVM.SetLayerIndexIsEnabled(True)
+               Map.refSliderManagerVM.SetLayerAdvancementIsEnabled(True)
+               Map.refSliceManagerVM.SetButtonsIsEnabled(True)
+            End If
          End If
       End If
-      If Map.refTopPanelVM.SelPage = Pages.SLICE AndAlso (m_Type = ViewLayerType.SOLID_SLICE OrElse m_Type = ViewLayerType.SLICE_TOOLPATH) Then
-         'If  Then
-         '   Map.refSliderManagerVM.SetSliderVisibility(Map.refViewLayerManagerVM.LayerList.Any(Function(x) (x.Type = ViewLayerType.SOLID_SLICE OrElse x.Type = ViewLayerType.START_MACHINING) AndAlso x.bIsVisible))
-         'End If
-      End If
+      ' se uno tra solid e toolpath e' attivo, visualizzo gli slider
+      Map.refSliderManagerVM.SetSliderVisibility(Map.refViewLayerManagerVM.LayerList.Any(Function(x) (x.Type = ViewLayerType.SOLID_SLICE OrElse x.Type = ViewLayerType.SLICE_TOOLPATH) AndAlso Not IsNothing(x.bIsVisible) AndAlso x.bIsVisible))
       Dim Status As GDB_ST = If(bIsVisible, GDB_ST.ON_, GDB_ST.OFF)
       For Each CurrPart In Map.refTopPanelVM.PartList
          Select Case m_Type