diff --git a/EgtGraphics.rc b/EgtGraphics.rc
index 65d1c57..793f481 100644
Binary files a/EgtGraphics.rc and b/EgtGraphics.rc differ
diff --git a/EgtGraphics.vcxproj b/EgtGraphics.vcxproj
index b452fd1..ddffdcd 100644
--- a/EgtGraphics.vcxproj
+++ b/EgtGraphics.vcxproj
@@ -22,7 +22,7 @@
     <ProjectGuid>{4EC970B1-B4D9-4088-8A31-B462CF72116E}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>EgtGraphics</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0.17763.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.20348.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
@@ -108,6 +108,7 @@
       <CompileAs>CompileAsCpp</CompileAs>
       <DisableSpecificWarnings>
       </DisableSpecificWarnings>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -170,6 +171,7 @@ copy $(TargetPath) \EgtProg\DllD64</Command>
       <EnableFiberSafeOptimizations>true</EnableFiberSafeOptimizations>
       <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
       <PrecompiledHeader>Use</PrecompiledHeader>
+      <LanguageStandard>stdcpp17</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
diff --git a/Scene.h b/Scene.h
index 005dd28..d677ec8 100644
--- a/Scene.h
+++ b/Scene.h
@@ -107,6 +107,7 @@ class Scene : public IEGrScene
       bool ZoomOnPoint( const Point3d& ptWin, double dCoeff) override ;
       bool ZoomWin( const Point3d& ptWin1, const Point3d& ptWin2) override ;
       bool RotateCameraWithCube() ;
+      void GetOrthoCamParam( double* pdWidth, double* pdHeight, double* pdNear, double* pdFar) const override ;
      // ShowMode
       bool SetShowMode( int nShowMode) override
                 { if ( nShowMode != SM_WIREFRAME  &&
@@ -143,6 +144,8 @@ class Scene : public IEGrScene
       bool SetGridShow( bool bShowGrid, bool bShowFrame) override ;
       bool SetGridGeo( double dSnapStep, int nMinLineSstep, int nMajLineSstep, int nExtSstep) override ;
       bool SetGridColor( Color colMinLine, Color colMajLine) override ;
+      void GetGridParam( double& dSnapStep, int& nExtStep) const override ;
+      bool GetShowGrid() override ;
      // Glob Frame
       bool SetGlobFrameShow( bool bShow) override ;
      // Glob Cube
@@ -291,9 +294,9 @@ class Scene : public IEGrScene
       HDC      m_hDC ;                    // Device Context
       HGLRC    m_hRC ;                    // OpenGL Rendering Context 
       int      m_nOglVer ;                // OpenGL Version
-      bool     m_bNewWay ;                // flag che indica nuova modalità (OpenGL 3.0 in poi)
+      bool     m_bNewWay ;                // flag che indica nuova modalit� (OpenGL 3.0 in poi)
      // Camera
-      Point3d  m_ptCenter ;               // centro verso cui è rivolta la camera
+      Point3d  m_ptCenter ;               // centro verso cui � rivolta la camera
       Vector3d m_vtDirCamera ;            // versore direzione dal centro alla camera
       double   m_dDistCamera ;            // distanza dal centro alla camera
       Vector3d m_vtUp ;                   // versore direzione Su della camera
@@ -309,7 +312,7 @@ class Scene : public IEGrScene
       int      m_nShowMode ;              // modo di visualizzazione (wireframe, hiddenline, shading)
       bool     m_bShowCurveDirection ;    // flag di visualizzazione direzione curve
       bool     m_bShowTriaAdvanced ;      // flag per abilitare la visualizzazione avanzata dei triangoli
-      int      m_nShowZmap ;              // modo visualizzazione Zmap (+1=surf, +2=spilloni, +4=normali, +8=più colori)
+      int      m_nShowZmap ;              // modo visualizzazione Zmap (+1=surf, +2=spilloni, +4=normali, +8=pi� colori)
       int      m_nShowText ;              // modo visualizzazione scritte (1=solo contorni, 2=con riempimento)
      // PointSize - LineWidth
       double   m_dPointSize ;             // dimensione punti
@@ -334,9 +337,9 @@ class Scene : public IEGrScene
       SelRec   m_nSelBuff[DIM_SEL_BUF] ;  // buffer per selezione con OpenGL
      // Snap
       // lo snap a oggetti usa la select, quindi anche per esso valgono m_nObjFilterForSelect e m_Unsel
-      int      m_nLastSnapId ;            // Id dell'entità generatrice dell'ultimo punto snap
+      int      m_nLastSnapId ;            // Id dell'entit� generatrice dell'ultimo punto snap
       Point3d  m_ptLastSnapPnt ;          // ultimo punto di snap
-      bool     m_bLastSnapDirOk ;         // flag validità direzione associata a ultimo punto snap
+      bool     m_bLastSnapDirOk ;         // flag validit� direzione associata a ultimo punto snap
       Vector3d m_vtLastSnapDir ;          // direzione associata a ultimo punto snap 
      // Geometry
       IGeomDB* m_pGeomDB ;                // puntatore al DB geometrico
diff --git a/SceneCamera.cpp b/SceneCamera.cpp
index c0727ef..f61df93 100644
--- a/SceneCamera.cpp
+++ b/SceneCamera.cpp
@@ -416,4 +416,18 @@ Scene::ZoomWin( const Point3d& ptWin1, const Point3d& ptWin2)
 
   // adatto le dimensioni a quelle della vista
    return AdjustDimView( dHalfWidth, dHalfHeight) ;
-}
\ No newline at end of file
+}
+
+//----------------------------------------------------------------------------
+void
+Scene::GetOrthoCamParam( double* pdWidth, double* pdHeight, double* pdNear, double* pdFar) const
+{
+    if ( pdWidth != nullptr)
+        *pdWidth = m_dHalfWidth ;
+    if ( pdHeight != nullptr)
+        *pdHeight = m_dHalfHeight ;
+    if ( pdNear != nullptr)
+        *pdNear = m_dZNear ;
+    if ( pdFar != nullptr)
+        *pdFar = m_dZFar ;
+}
diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index 4c31ff1..adbe088 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -301,7 +301,7 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
             return false ;
         // aggiorno la grafica (colori speciali)
          PolyLine plX, plY, plZ ;
-         pFrame->GetDrawWithArrowHeads( 10, 0.1, plX, plY, plZ) ;
+         pFrame->GetDrawWithArrowHeads( 40, 0.1, plX, plY, plZ) ;
          pGraphics->Clear() ;
          pGraphics->AddColor( RED) ;
          pGraphics->AddPolyLine( plX) ; 
diff --git a/SceneGrid.cpp b/SceneGrid.cpp
index 8ac1a0c..afa901f 100644
--- a/SceneGrid.cpp
+++ b/SceneGrid.cpp
@@ -196,4 +196,19 @@ Scene::DrawGrid( void)
    glLineWidth( (float) GetLineWidth()) ;
 
    return true ;
+}
+
+//----------------------------------------------------------------------------
+void 
+Scene::GetGridParam( double& dSnapStep, int& nExtStep) const
+{
+   dSnapStep = m_dSnapStep ;
+   nExtStep = m_nExtSstep ;
+}
+
+//----------------------------------------------------------------------------
+bool
+Scene::GetShowGrid() 
+{
+   return m_bShowGrid ;
 }
\ No newline at end of file