diff --git a/src/src/Rendering/Core/DraggableActor.cpp b/src/src/Rendering/Core/DraggableActor.cpp
index 6a76ea8..e27776f 100644
--- a/src/src/Rendering/Core/DraggableActor.cpp
+++ b/src/src/Rendering/Core/DraggableActor.cpp
@@ -109,6 +109,7 @@ void DraggableActor::Transform(float x, float y) {
     if (this->OnDrag) {
         OnDrag(renderPoints);
     }
+    Modified();
 }
 
 void DraggableActor::ApplyTransform() {
@@ -143,8 +144,11 @@ void DraggableActor::ReleaseGraphicsResources(vtkWindow *window) {
 
 int DraggableActor::RenderOverlay(vtkViewport *viewport) {
     if (BaseDataPoints->GetNumberOfPoints()<=0) return vtkProp::RenderOverlay(viewport);
-    QString newRenderTime = QString("%1-%2-%3").arg(BaseDataPoints->GetMTime())
-        .arg(Renderer->GetMTime()).arg(Renderer->GetActiveCamera()->GetMTime());
+    QString rendererSize = QString("rendererSize:%1,%2").arg(Renderer->GetRenderWindow()->GetSize()[0]).arg(Renderer->GetRenderWindow()->GetSize()[1]);
+    QString newRenderTime = QString("%1-%2-%3-%4").arg(BaseDataPoints->GetMTime())
+        .arg(rendererSize).arg(Renderer->GetActiveCamera()->GetMTime())
+        .arg(GetMTime());
+    
     if (mRenderTime != newRenderTime) 
     {
         BuildShape();
diff --git a/src/src/Rendering/Measure/AngleAnnotationActor.cpp b/src/src/Rendering/Measure/AngleAnnotationActor.cpp
index 5b57f59..ca1b707 100644
--- a/src/src/Rendering/Measure/AngleAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/AngleAnnotationActor.cpp
@@ -152,6 +152,7 @@ void AngleAnnotationActor::onMeasureMouseMove(vtkRenderWindowInteractor *iren) {
     }
     controlP3->SetWorldPosition(p);
     this->SetWorldPosition3(p);
+    Modified();
     iren->Render();
 }
 
@@ -179,6 +180,7 @@ bool AngleAnnotationActor::onMeasureLeftButtonDown(vtkRenderWindowInteractor *ir
         this->placedPointCount = 3;
         controlP2->Highlight(0);
     }
+
     iren->Render();
     return this->placedPointCount < 3;
 }
@@ -209,6 +211,7 @@ void AngleAnnotationActor::controlPointCb(vtkObject *sender, unsigned long event
     double result[3] = {0, 0, 0};
     MapScreenPointToWorld(pos[0], pos[1], this->Renderer, result);
     BaseDataPoints->SetPoint(index, result);
+    BaseDataPoints->Modified();
 }
 
 void AngleAnnotationActor::selfDragCb(vtkObject *, unsigned long, void *data) {
diff --git a/src/src/Rendering/Measure/LineAnnotationActor.cpp b/src/src/Rendering/Measure/LineAnnotationActor.cpp
index 559a5b1..634158f 100644
--- a/src/src/Rendering/Measure/LineAnnotationActor.cpp
+++ b/src/src/Rendering/Measure/LineAnnotationActor.cpp
@@ -73,6 +73,7 @@ void LineAnnotationActor::controlPointCb(vtkObject *sender, unsigned long event,
     double result[3] = {0, 0, 0};
     MapScreenPointToWorld(pos[0], pos[1], this->Renderer, result);
     BaseDataPoints->SetPoint(index, result);
+    BaseDataPoints->Modified();
 }
 
 void LineAnnotationActor::selfDragCb(vtkObject *, unsigned long, void *data) {
@@ -95,6 +96,7 @@ void LineAnnotationActor::onMeasureMouseMove(vtkRenderWindowInteractor *iren) {
     MapScreenPointToWorld(x,y,renderer,p);
     controlP2->SetWorldPosition(p);
     this->SetWorldPosition2(p);
+    Modified();
     iren->Render();
 }