diff --git a/Common/RenderWindow.cxx b/Common/RenderWindow.cxx
index c4c8794..24e7bca 100644
--- a/Common/RenderWindow.cxx
+++ b/Common/RenderWindow.cxx
@@ -100,62 +100,20 @@ class MyInteractorStyleTrackballCamera:public
 	virtual void OnChar ()
 	{
 		vtkRenderWindowInteractor *rwi = this->Interactor;
-		switch (rwi->GetKeyCode ())
-		{
-		case '1':
+		std::string key = rwi->GetKeySym();
+
+		if ( key == "F1" )
 			this->Window->Capture ("Capture.jpg");
-			return;
-		case '2':
+		else if ( key == "F2" )
 			this->Window->Capture ("Capture.eps");
-			return;
-		case '3':
+		else if ( key == "F3" )
 			this->Window->Capture ("Capture.png");
-			return;
-		case '4' :
+		else if ( key == "F4" ) {
 			int Factor;
 			cout<<"Enter new magnification factor :";
 			cin>>Factor;
 			this->Window->SetCaptureMagnificationFactor(Factor);
-			return;
-		case 'E' :
-			int Number;
-			cout<<"Enter number of interactions to skip :";
-			cin>>Number;
-			this->Window->SkipInteractions(Number);
-			return;
-		case 'N':
-		case 'n':
-			this->Window->EnableNormalMap();
-			return;
-
-		case 'x':
-		case 'X':
-			if (this->EdgesDisplay == 0)
-			{
-				this->EdgesDisplay = 1;
-				this->Window->DisplayInputEdges ();
-			}
-			else
-			{
-				this->EdgesDisplay = 0;
-				this->Window->SetInputEdges (0);
-			}
-			this->Window->Render ();
-			return;
-		case 'I':
-		case 'i':
-			this->Window->SwitchDisplayIds ();
-			return;
-		case 'a':
-			this->Window->Render();
-			return;
-		case 'O':
-		case 'o':
-			this->Window->SwitchOrientation();
-			this->Window->Render();
-			return;
-		case '5':
-		{
+		} else if ( key == "F5" ) {
 			char name[100];
 			cout<<"Save Camera (.view)"<<endl;
 			cout<<"Enter name  : ";
@@ -163,10 +121,7 @@ class MyInteractorStyleTrackballCamera:public
 
 			this->Window->SaveCamera(name);
 
-			return;
-		}
-		case '6':
-		{
+		} else if ( key == "F6" ) {
 			char name[100];
 			int flag;
 			cout<<"Load Camera"<<endl;
@@ -180,54 +135,77 @@ class MyInteractorStyleTrackballCamera:public
 			cout<<"Load "<<name<<"	->	[OK]"<<endl;
 			else
 			cout<<"Load"<<name<<"	->	[BUG]"<<endl;
-
-			return;
-		}
-		case '7':
-		{
+		} else if ( key == "F7" ) {
 			vtkPolyDataWriter * SWriter = vtkPolyDataWriter::New ();
 			SWriter->SetInputData (this->Window->GetInput ());
 			SWriter->SetFileName ("mesh.vtk");
 			SWriter->Write ();
 			SWriter->Delete ();
-			return;
-		}
-		case '8':
-		{
+		} else if ( key == "F8" ) {
 			vtkOBJExporter * SWriter = vtkOBJExporter::New ();
 			SWriter->SetInput (this->Window->GetvtkRenderWindow());
 			SWriter->SetFilePrefix ("mesh");
 			SWriter->Write ();
 			SWriter->Delete ();
-			return;
-		}
-		case '9':
-		{
+		} else if ( key == "F9" ) {
 			vtkSTLWriter * SWriter = vtkSTLWriter::New ();
 			SWriter->SetInputData (this->Window->GetInput ());
 			SWriter->SetFileName ("mesh.stl");
 			SWriter->Write ();
 			SWriter->Delete ();
-			return;
-		}
-		case '0':
-		{
+		} else if ( key == "F10" ) {
 			vtkPLYWriter * Writer = vtkPLYWriter::New ();
 			Writer->SetInputData (this->Window->GetInput ());
 			Writer->SetFileName ("mesh.ply");
 			Writer->Write ();
 			Writer->Delete ();
-			return;
-		}
-		case '_':
-		{
+		} else if ( key == "F11" ) {
 			vtkVRMLExporter * Writer = vtkVRMLExporter::New ();
 			Writer->SetInput (this->Window->GetvtkRenderWindow());
 			Writer->SetFileName ("mesh.wrl");
 			Writer->Write ();
 			Writer->Delete ();
-			return;
 		}
+
+		switch (rwi->GetKeyCode ())
+		{
+		case 'E' :
+			int Number;
+			cout<<"Enter number of interactions to skip :";
+			cin>>Number;
+			this->Window->SkipInteractions(Number);
+			break;
+		case 'N':
+		case 'n':
+			this->Window->EnableNormalMap();
+			break;
+
+		case 'x':
+		case 'X':
+			if (this->EdgesDisplay == 0)
+			{
+				this->EdgesDisplay = 1;
+				this->Window->DisplayInputEdges ();
+			}
+			else
+			{
+				this->EdgesDisplay = 0;
+				this->Window->SetInputEdges (0);
+			}
+			this->Window->Render ();
+			break;
+		case 'I':
+		case 'i':
+			this->Window->SwitchDisplayIds ();
+			break;
+		case 'a':
+			this->Window->Render();
+			break;
+		case 'O':
+		case 'o':
+			this->Window->SwitchOrientation();
+			this->Window->Render();
+			break;
 		case '+':
 		{
 			if (this->Window->GetEdgesActor())
@@ -236,7 +214,6 @@ class MyInteractorStyleTrackballCamera:public
 					this->Window->GetEdgesActor()->GetProperty()->GetLineWidth()+1);
 				this->Window->Render();
 			}
-			return;
 		}
 		case '-':
 		{
@@ -246,7 +223,6 @@ class MyInteractorStyleTrackballCamera:public
 					this->Window->GetEdgesActor()->GetProperty()->GetLineWidth()-1);
 				this->Window->Render();
 			}
-			return;
 		}
 		case 'v':
 		{
@@ -282,7 +258,6 @@ class MyInteractorStyleTrackballCamera:public
 			}
 			cout<<endl;
 			*/
-			return;
 		}
 		case 't':
 		{
@@ -444,7 +419,7 @@ RenderWindow::AddText (char *text, float x, float y, float z, float R,
 
 	Actor->SetMapper (Mapper);
 	Mapper->Delete();
-	this->GetMeshRenderer()->AddActor2D (Actor);
+	this->GetMeshRenderer()->AddViewProp (Actor);
 }
 
 void
@@ -995,11 +970,10 @@ RenderWindow::GetEdgesVisibilityArray()
 void
 RenderWindow::SwitchDisplayIds ()
 {
-	vtkActor2DCollection *Actors = this->GetMeshRenderer()->GetActors2D ();
+	auto *Actors = this->GetMeshRenderer()->GetViewProps ();
 
-	vtkActor2D *Actor;
 	Actors->InitTraversal ();
-	Actor = Actors->GetNextActor2D ();
+	auto Actor = Actors->GetNextProp ();
 
 	while (Actor)
 	{
@@ -1009,7 +983,7 @@ RenderWindow::SwitchDisplayIds ()
 			this->SetDisplayIdsOff ();
 			return;
 		}
-		Actor = Actors->GetNextActor2D ();
+		Actor = Actors->GetNextProp ();
 
 	}
 
@@ -1137,9 +1111,9 @@ RenderWindow::SetDisplayIdsOn ()
 		cellLabels->SetMapper (cellMapper);
 	}
 
-	Renderer->AddActor2D (rectActor);
-	Renderer->AddActor2D (pointLabels);
-	Renderer->AddActor2D (cellLabels);
+	Renderer->AddViewProp (rectActor);
+	Renderer->AddViewProp (pointLabels);
+	Renderer->AddViewProp (cellLabels);
 
 
 	renWin->Render ();