diff --git a/Modules/QtWidgets/include/QmitkRenderWindowWidget.h b/Modules/QtWidgets/include/QmitkRenderWindowWidget.h
index ae8e15497a..d7a4815914 100644
--- a/Modules/QtWidgets/include/QmitkRenderWindowWidget.h
+++ b/Modules/QtWidgets/include/QmitkRenderWindowWidget.h
@@ -1,119 +1,113 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical Image Computing.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 #ifndef QMITKRENDERWINDOWWIDGET_H
 #define QMITKRENDERWINDOWWIDGET_H
 
 // qt widgets module
 #include "MitkQtWidgetsExports.h"
 #include "QmitkRenderWindow.h"
 
 // mitk core
 #include <mitkDataStorage.h>
 #include <mitkPointSet.h>
 #include <mitkRenderWindow.h>
 #include <vtkMitkRectangleProp.h>
 #include <vtkCornerAnnotation.h>
 
 // qt
 #include <QWidget>
 #include <QHBoxLayout>
 
 /**
-* @brief 
-*
-*
+* @brief The 'QmitkRenderWindowWidget' is a QWidget that holds a render window
+*        and some associates properties, like a crosshair (pointset) and decorations.
+*        Decorations are corner annotation (text and color), frame color or background color
+*        and can be set using this class.
+*        The 'QmitkRenderWindowWidget' is used inside the 'QmitkMxNMultiWidget', where a map contains
+*        several render window widgets to create the MxN display.
 */
 class MITKQTWIDGETS_EXPORT QmitkRenderWindowWidget : public QWidget
 {
   Q_OBJECT
 
 public:
 
   QmitkRenderWindowWidget(
     QWidget* parent = nullptr,
     const QString& widgetName = "",
     mitk::DataStorage* dataStorage = nullptr,
     mitk::BaseRenderer::RenderingMode::Type renderingMode = mitk::BaseRenderer::RenderingMode::Standard
   );
 
   ~QmitkRenderWindowWidget() override;
 
   void SetDataStorage(mitk::DataStorage* dataStorage);
 
   const QString& GetWidgetName() const { return m_WidgetName; };
   QmitkRenderWindow* GetRenderWindow() const { return m_RenderWindow; };
 
   mitk::SliceNavigationController* GetSliceNavigationController() const;
 
   void RequestUpdate();
   void ForceImmediateUpdate();
 
   void SetGradientBackgroundColors(const mitk::Color& upper, const mitk::Color& lower);
   void ShowGradientBackground(bool enable);
   std::pair<mitk::Color, mitk::Color> GetGradientBackgroundColors() const { return m_GradientBackgroundColors; };
   bool IsGradientBackgroundOn() const;
 
   void SetDecorationColor(const mitk::Color& color);
   mitk::Color GetDecorationColor() const { return m_DecorationColor; };
 
   void ShowColoredRectangle(bool show);
   bool IsColoredRectangleVisible() const;
 
   void ShowCornerAnnotation(bool show);
   bool IsCornerAnnotationVisible() const;
   void SetCornerAnnotationText(const std::string& cornerAnnotation);
   std::string GetCornerAnnotationText() const;
 
-  /**
-  * @brief Create a corner annotation and a colored rectangle for this widget.
-  *
-  * @par text   The text of the corner annotation.
-  * @par color  The color of the text and the rectangle.
-  */
-  void SetDecorationProperties(std::string text, mitk::Color color);
-
   bool IsRenderWindowMenuActivated() const;
 
   void ActivateCrosshair(bool activate);
 
 private:
 
   void InitializeGUI();
   void InitializeDecorations();
 
   void SetCrosshair(mitk::Point3D selectedPoint);
 
   QString m_WidgetName;
   QHBoxLayout* m_Layout;
 
   mitk::DataStorage* m_DataStorage;
   QmitkRenderWindow* m_RenderWindow;
 
   mitk::RenderingManager::Pointer m_RenderingManager;
   mitk::BaseRenderer::RenderingMode::Type m_RenderingMode;
-  mitk::SliceNavigationController* m_TimeNavigationController;
 
   mitk::DataNode::Pointer m_PointSetNode;
   mitk::PointSet::Pointer m_PointSet;
 
   std::pair<mitk::Color, mitk::Color> m_GradientBackgroundColors;
   mitk::Color m_DecorationColor;
   vtkSmartPointer<vtkMitkRectangleProp> m_RectangleProp;
   vtkSmartPointer<vtkCornerAnnotation> m_CornerAnnotation;
 };
 
 #endif // QMITKRENDERWINDOWWIDGET_H