diff --git a/src/board/UBBoardPaletteManager.cpp b/src/board/UBBoardPaletteManager.cpp
index 698a9820..145e4035 100755
--- a/src/board/UBBoardPaletteManager.cpp
+++ b/src/board/UBBoardPaletteManager.cpp
@@ -38,6 +38,9 @@
 #include "web/browser/WBTabWidget.h"
 #include "web/browser/WBWebView.h"
 
+#include "desktop/UBDesktopAnnotationController.h"
+
+
 #include "network/UBNetworkAccessManager.h"
 #include "network/UBServerXMLHttpRequest.h"
 
@@ -76,7 +79,7 @@ UBBoardPaletteManager::UBBoardPaletteManager(QWidget* container, UBBoardControll
     , mpPageNavigWidget(NULL)
     , mpLibWidget(NULL)
     , mpCachePropWidget(NULL)
-    , mDesktopRightPalette(NULL)
+//    , mDesktopRightPalette(NULL)
     , mpTeacherBarWidget(NULL)
     , mpDesktopLibWidget(NULL)
 {
@@ -131,11 +134,11 @@ UBBoardPaletteManager::~UBBoardPaletteManager()
         delete mpDesktopLibWidget;
         mpDesktopLibWidget = NULL;
     }
-    if(NULL != mDesktopRightPalette)
-    {
-        delete mDesktopRightPalette;
-        mDesktopRightPalette = NULL;
-    }
+//     if(NULL != mDesktopRightPalette)
+//     {
+//         delete mDesktopRightPalette;
+//         mDesktopRightPalette = NULL;
+//     }
 }
 
 void UBBoardPaletteManager::initPalettesPosAtStartup()
@@ -153,34 +156,65 @@ void UBBoardPaletteManager::setupLayout()
  */
 void UBBoardPaletteManager::setupDockPaletteWidgets()
 {
+
+    //------------------------------------------------//
+    // Create the widgets for the dock palettes
+
+    mpPageNavigWidget = new UBPageNavigationWidget();
+    mpPageNavigWidget->registerMode(eUBDockPaletteWidget_BOARD);
+    connect(this, SIGNAL(signal_changeMode(eUBDockPaletteWidgetMode)), mpPageNavigWidget, SLOT(slot_changeMode(eUBDockPaletteWidgetMode)));
+
+    mpLibWidget = new UBLibWidget();
+    mpLibWidget ->registerMode(eUBDockPaletteWidget_BOARD);
+    mpLibWidget ->registerMode(eUBDockPaletteWidget_DESKTOP);
+    connect(this, SIGNAL(signal_changeMode(eUBDockPaletteWidgetMode)), mpLibWidget, SLOT(slot_changeMode(eUBDockPaletteWidgetMode)));
+
+//     mpCachePropWidget = new UBCachePropertiesWidget();
+//     mpCachePropWidget->registerMode(eUBDockPaletteWidget_BOARD);
+//     connect(this, SIGNAL(signal_changeMode(eUBDockPaletteWidgetMode)), mpCachePropWidget, SLOT(slot_changeMode(eUBDockPaletteWidgetMode)));
+
+//     mpTeacherBarWidget = new UBTeacherBarWidget();
+//     mpTeacherBarWidget->registerMode(eUBDockPaletteWidget_BOARD);
+//     connect(this, SIGNAL(signal_changeMode(eUBDockPaletteWidgetMode)), mpTeacherBarWidget, SLOT(slot_changeMode(eUBDockPaletteWidgetMode)));
+
+    //------------------------------------------------//
+    // Add the dock palettes
+    mLeftPalette = new UBLeftPalette(mContainer);
+
     // LEFT palette widgets
     mLeftPalette->registerWidget(mpPageNavigWidget);
     mLeftPalette->addTabWidget(mpPageNavigWidget);
+
     mLeftPalette->connectSignals();
 
+    //------------------------------------------------//
+
+    mRightPalette = new UBRightPalette(mContainer);
+
     // RIGHT palette widgets
     mRightPalette->registerWidget(mpLibWidget);
-    mRightPalette->registerWidget(mpCachePropWidget);
     mRightPalette->addTabWidget(mpLibWidget);
 
-    mRightPalette->registerWidget(mpTeacherBarWidget);
-    //mRightPalette->addTabWidget(mpTeacherBarWidget);
+//     // ???
+//     mRightPalette->registerWidget(mpCachePropWidget); 
+//     mRightPalette->addTabWidget(mpCachePropWidget);
+
+//     // ???
+//     mRightPalette->registerWidget(mpTeacherBarWidget);
+//     mRightPalette->addTabWidget(mpTeacherBarWidget);
+
     mRightPalette->connectSignals();
+
+    //------------------------------------------------//
+
     mLeftPalette->showTabWidget(0);
     mRightPalette->showTabWidget(0);
+
+    //------------------------------------------------//
 }
 
 void UBBoardPaletteManager::setupPalettes()
 {
-    // Add the dock palettes
-    mLeftPalette = new UBLeftPalette(mContainer);
-    mRightPalette = new UBRightPalette(mContainer);
-
-    // Create the widgets for the dock palettes
-    mpPageNavigWidget = new UBPageNavigationWidget();
-    mpLibWidget = new UBLibWidget();
-    mpCachePropWidget = new UBCachePropertiesWidget();
-    mpTeacherBarWidget = new UBTeacherBarWidget();
 
     setupDockPaletteWidgets();
 
@@ -435,6 +469,8 @@ void UBBoardPaletteManager::containerResized()
             mKeyboardPalette->adjustSizeAndPosition();
     }
 
+    mLeftPalette->resize(mLeftPalette->width()-1, mContainer->height());
+    mRightPalette->resize(mRightPalette->width()-1, mContainer->height());
     mLeftPalette->resize(mLeftPalette->width(), mContainer->height());
     mRightPalette->resize(mRightPalette->width(), mContainer->height());
 }
@@ -569,6 +605,53 @@ void UBBoardPaletteManager::addItem(const QUrl& pUrl)
 
 }
 
+void UBBoardPaletteManager::changeMode(eUBDockPaletteWidgetMode newMode)
+{
+    switch( newMode )
+    {
+        case eUBDockPaletteWidget_BOARD:
+            {
+                mLeftPalette->setParent(UBApplication::boardController->controlContainer());
+                mRightPalette->setParent(UBApplication::boardController->controlContainer());
+
+                mLeftPalette->setVisible(true);
+                mRightPalette->setVisible(true);
+
+                containerResized();
+            }
+            break;
+
+        case eUBDockPaletteWidget_DESKTOP:
+            {
+                mLeftPalette->setParent((QWidget*)UBApplication::applicationController->uninotesController()->drawingView());
+                mRightPalette->setParent((QWidget*)UBApplication::applicationController->uninotesController()->drawingView());
+
+                mLeftPalette->setVisible(false);
+                mRightPalette->setVisible(true);
+
+                UBApplication::applicationController->uninotesController()->TransparentWidgetResized();
+            }
+            break;
+
+        default:
+            {
+                mLeftPalette->setVisible(false);
+                mRightPalette->setVisible(false);
+                mLeftPalette->setParent(0);
+                mRightPalette->setParent(0);
+            }
+            break;
+    }
+
+    emit signal_changeMode(newMode);
+}
+
+/*
+void UBBoardPaletteManager::slot_changeMode(eUBDockPaletteWidgetMode newMode)
+{
+    emit signal_changeMode(newMode);
+}
+*/
 
 void UBBoardPaletteManager::addItem(const QPixmap& pPixmap, const QPointF& pos,  qreal scaleFactor, const QUrl& sourceUrl)
 {
@@ -719,6 +802,7 @@ void UBBoardPaletteManager::changeStylusPaletteOrientation(QVariant var)
     mStylusPalette->setVisible(bVisible); // always show stylus palette at startup
 }
 
+/*
 UBRightPalette* UBBoardPaletteManager::createDesktopRightPalette(QWidget* parent)
 {
     mpDesktopLibWidget = new UBLibWidget();
@@ -729,6 +813,7 @@ UBRightPalette* UBBoardPaletteManager::createDesktopRightPalette(QWidget* parent
 
     return mDesktopRightPalette;
 }
+*/
 
 void UBBoardPaletteManager::connectToDocumentController()
 {
diff --git a/src/board/UBBoardPaletteManager.h b/src/board/UBBoardPaletteManager.h
index f2313a71..5fab9c5c 100644
--- a/src/board/UBBoardPaletteManager.h
+++ b/src/board/UBBoardPaletteManager.h
@@ -48,15 +48,19 @@ class UBBoardPaletteManager : public QObject
 
         void setupLayout();
         UBLeftPalette* leftPalette(){return mLeftPalette;}
+        UBRightPalette* rightPalette(){return mRightPalette;}
         void showVirtualKeyboard(bool show = true);
         void initPalettesPosAtStartup();
         void connectToDocumentController();
 
         UBKeyboardPalette *mKeyboardPalette;
-        UBRightPalette* createDesktopRightPalette(QWidget* parent);
+//        UBRightPalette* createDesktopRightPalette(QWidget* parent);
+
+        void changeMode(eUBDockPaletteWidgetMode newMode);
 
     signals:
         void connectToDocController();
+        void signal_changeMode(eUBDockPaletteWidgetMode newMode);
 
     public slots:
 
@@ -65,6 +69,8 @@ class UBBoardPaletteManager : public QObject
         void addItem(const QUrl& pUrl);
         void addItem(const QPixmap& pPixmap, const QPointF& p = QPointF(0.0, 0.0), qreal scale = 1.0, const QUrl& sourceUrl = QUrl());
 
+//        void slot_changeMode(eUBDockPaletteWidgetMode newMode);
+
     private:
 
         void setupPalettes();
@@ -84,10 +90,10 @@ class UBBoardPaletteManager : public QObject
         /** The right dock palette */
         UBRightPalette* mRightPalette;
 
-        // HACK: here we duplicate the right palette for the desktop mode
-        //       we MUST refactor the architecture in order to use only one
-        //       right palette!
-        UBRightPalette* mDesktopRightPalette;
+//         // HACK: here we duplicate the right palette for the desktop mode
+//         //       we MUST refactor the architecture in order to use only one
+//         //       right palette!
+//         UBRightPalette* mDesktopRightPalette;
 
         UBActionPalette *mBackgroundsPalette;
         UBActionPalette *mToolsPalette;
diff --git a/src/board/UBBoardView.cpp b/src/board/UBBoardView.cpp
index 2eed5112..2cb28ef9 100644
--- a/src/board/UBBoardView.cpp
+++ b/src/board/UBBoardView.cpp
@@ -660,8 +660,8 @@ UBBoardView::wheelEvent (QWheelEvent *wheelEvent)
         QBool isSlectedAndMouseHower = itemsList.contains(selItem);
         if(isSlectedAndMouseHower)
         {
-            wheelEvent->accept();
             QGraphicsView::wheelEvent(wheelEvent);
+            wheelEvent->accept();
         }
 
     }
diff --git a/src/core/UBApplicationController.cpp b/src/core/UBApplicationController.cpp
index 4fad106a..f6b002ee 100644
--- a/src/core/UBApplicationController.cpp
+++ b/src/core/UBApplicationController.cpp
@@ -336,6 +336,7 @@ void UBApplicationController::showBoard()
     mMainWindow->boardToolBar->show();
 
     mMainMode = Board;
+    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_BOARD);
 
     adaptToolBar();
 
@@ -352,6 +353,8 @@ void UBApplicationController::showBoard()
     mUninoteController->hideWindow();
     mMainWindow->show();
 
+//     UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_BOARD);
+
     emit mainModeChanged(Board);
 }
 
@@ -365,6 +368,8 @@ void UBApplicationController::showInternet()
         UBApplication::boardController->hide();
     }
 
+    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_WEB);
+
     if (UBSettings::settings()->webUseExternalBrowser->get().toBool())
     {
         showDesktop(true);
@@ -384,8 +389,10 @@ void UBApplicationController::showInternet()
         mUninoteController->hideWindow();
         emit mainModeChanged(Internet);
     }
-    UBApplication::webController->show(UBWebController::WebBrowser);
 
+//    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_WEB);
+
+    UBApplication::webController->show(UBWebController::WebBrowser);
 }
 
 
@@ -397,6 +404,7 @@ void UBApplicationController::showDocument()
     mMainWindow->documentToolBar->show();
 
     mMainMode = Document;
+    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_DOCUMENT);
 
     adaptToolBar();
 
@@ -418,6 +426,8 @@ void UBApplicationController::showDocument()
 
     mUninoteController->hideWindow();
 
+//    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_DOCUMENT);
+
     emit mainModeChanged(Document);
 }
 
@@ -429,6 +439,8 @@ void UBApplicationController::showDesktop(bool dontSwitchFrontProcess)
         UBApplication::boardController->hide();
 
     mMainWindow->hide();
+    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_DESKTOP);
+
     mUninoteController->showWindow();
 
     if (mMirror)
@@ -444,6 +456,8 @@ void UBApplicationController::showDesktop(bool dontSwitchFrontProcess)
         UBPlatformUtils::bringPreviousProcessToFront();
     }
 
+//    UBApplication::boardController->paletteManager()->changeMode(eUBDockPaletteWidget_DESKTOP);
+
     UBDrawingController::drawingController()->setStylusTool(UBStylusTool::Selector);
 }
 
diff --git a/src/desktop/UBDesktopAnnotationController.cpp b/src/desktop/UBDesktopAnnotationController.cpp
index 458c3534..a4b9c92d 100644
--- a/src/desktop/UBDesktopAnnotationController.cpp
+++ b/src/desktop/UBDesktopAnnotationController.cpp
@@ -56,7 +56,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent)
         , mDesktopPenPalette(NULL)
         , mDesktopMarkerPalette(NULL)
         , mDesktopEraserPalette(NULL)
-        , mRightPalette(NULL)
+//        , mRightPalette(NULL)
         , mWindowPositionInitialized(0)
         , mIsFullyTransparent(false)
         , mDesktopToolsPalettePositioned(false)
@@ -89,7 +89,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent)
     mTransparentDrawingScene = new UBGraphicsScene(0);
     mTransparentDrawingView->setScene(mTransparentDrawingScene);
 
-    mRightPalette = UBApplication::boardController->paletteManager()->createDesktopRightPalette(mTransparentDrawingView);
+//    mRightPalette = UBApplication::boardController->paletteManager()->createDesktopRightPalette(mTransparentDrawingView);
     //mRightPalette = new UBRightPalette(mTransparentDrawingView);
 
     mDesktopPalette = new UBDesktopPalette(mTransparentDrawingView);
@@ -158,7 +158,8 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent)
 
 #ifdef Q_WS_X11
     connect(mDesktopPalette, SIGNAL(moving()), this, SLOT(refreshMask()));
-    connect(mRightPalette, SIGNAL(resized()), this, SLOT(refreshMask()));
+//    connect(mRightPalette, SIGNAL(resized()), this, SLOT(refreshMask()));
+    connect(UBApplication::boardController->paletteManager()->rightPalette(), SIGNAL(resized()), this, SLOT(refreshMask()));
 #endif
     onDesktopPaletteMaximized();
 }
@@ -859,12 +860,34 @@ void UBDesktopAnnotationController::onDesktopPaletteMinimize()
     }
 }
 
+void UBDesktopAnnotationController::TransparentWidgetResized()
+{
+/*
+    int rW = UBApplication::boardController->paletteManager()->rightPalette()->width();
+    int rH_ = UBApplication::boardController->paletteManager()->rightPalette()->height();
+    int rH = mTransparentDrawingView->height();
+
+    UBApplication::boardController->paletteManager()->rightPalette()->resize(rW+1, rH);
+
+  //  UBApplication::boardController->paletteManager()->rightPalette()->resize(500, 500);
+*/
+
+    onTransparentWidgetResized();
+}
+
 /**
  * \brief Resize the library palette.
  */
 void UBDesktopAnnotationController::onTransparentWidgetResized()
 {
-      mRightPalette->resize(mRightPalette->width(), mTransparentDrawingView->height());
+    int rW = UBApplication::boardController->paletteManager()->rightPalette()->width();
+    int rH_ = UBApplication::boardController->paletteManager()->rightPalette()->height();
+    int rH = mTransparentDrawingView->height();
+
+    UBApplication::boardController->paletteManager()->rightPalette()->resize(rW+1, rH);
+    UBApplication::boardController->paletteManager()->rightPalette()->resize(rW, rH);
+
+//      mRightPalette->resize(mRightPalette->width(), mTransparentDrawingView->height());
 }
 
 void UBDesktopAnnotationController::updateMask(bool bTransparent)
@@ -891,10 +914,15 @@ void UBDesktopAnnotationController::updateMask(bool bTransparent)
         {
             p.drawRect(mKeyboardPalette->geometry().x(), mKeyboardPalette->geometry().y(), mKeyboardPalette->width(), mKeyboardPalette->height());
         }
-        if(mRightPalette->isVisible())
+
+//        UBApplication::boardController->paletteManager()->mDesktopRightPalette
+        if(UBApplication::boardController->paletteManager()->rightPalette()->isVisible())
         {
             qDebug() << ">>>>>> Drawing the mask for the right palette";
-            p.drawRect(mRightPalette->geometry().x(), mRightPalette->geometry().y(), mRightPalette->width(), mRightPalette->height());
+            p.drawRect(UBApplication::boardController->paletteManager()->rightPalette()->geometry().x(), 
+                UBApplication::boardController->paletteManager()->rightPalette()->geometry().y(), 
+                UBApplication::boardController->paletteManager()->rightPalette()->width(), 
+                UBApplication::boardController->paletteManager()->rightPalette()->height());
         }
 
         p.end();
diff --git a/src/desktop/UBDesktopAnnotationController.h b/src/desktop/UBDesktopAnnotationController.h
index d61d7607..b3a9e37f 100644
--- a/src/desktop/UBDesktopAnnotationController.h
+++ b/src/desktop/UBDesktopAnnotationController.h
@@ -55,6 +55,9 @@ class UBDesktopAnnotationController : public QObject
         UBDesktopPalette *desktopPalette();
         UBBoardView *drawingView();
 
+        void TransparentWidgetResized();
+
+
     public slots:
 
         void screenLayoutChanged();
diff --git a/src/gui/UBDockPalette.h b/src/gui/UBDockPalette.h
index 627535da..b69d0653 100644
--- a/src/gui/UBDockPalette.h
+++ b/src/gui/UBDockPalette.h
@@ -123,6 +123,8 @@ protected:
     /** The current widget */
     QVector<UBDockPaletteWidget*> mRegisteredWidgets;
 
+//     QVector<UBDockPaletteWidget*> mVisibleWidgets; // ???
+
 private slots:
     void onToolbarPosUpdated();
     void onResizeRequest(QResizeEvent* event);
diff --git a/src/gui/UBDockPaletteWidget.cpp b/src/gui/UBDockPaletteWidget.cpp
index d649d9a5..9cd1197c 100644
--- a/src/gui/UBDockPaletteWidget.cpp
+++ b/src/gui/UBDockPaletteWidget.cpp
@@ -24,3 +24,16 @@ QString UBDockPaletteWidget::name()
 {
     return mName;
 }
+
+void UBDockPaletteWidget::registerMode(eUBDockPaletteWidgetMode mode)
+{
+    if(!mRegisteredModes.contains(mode))
+        mRegisteredModes.append(mode);
+}
+
+void UBDockPaletteWidget::slot_changeMode(eUBDockPaletteWidgetMode newMode)
+{
+    this->setVisible(mRegisteredModes.contains(newMode));
+}
+
+
diff --git a/src/gui/UBDockPaletteWidget.h b/src/gui/UBDockPaletteWidget.h
index 69a70a8a..aa97a029 100644
--- a/src/gui/UBDockPaletteWidget.h
+++ b/src/gui/UBDockPaletteWidget.h
@@ -5,8 +5,17 @@
 #include <QPixmap>
 #include <QString>
 
+typedef enum
+{
+    eUBDockPaletteWidget_BOARD,
+    eUBDockPaletteWidget_WEB,
+    eUBDockPaletteWidget_DOCUMENT,
+    eUBDockPaletteWidget_DESKTOP,
+} eUBDockPaletteWidgetMode;
+
 class UBDockPaletteWidget : public QWidget
 {
+
     Q_OBJECT
 public:
     UBDockPaletteWidget(QWidget* parent=0, const char* name="UBDockPaletteWidget");
@@ -16,10 +25,21 @@ public:
     QPixmap iconToLeft();
     QString name();
 
+    void registerMode(eUBDockPaletteWidgetMode mode);
+
+    /* The current widget available mode list */
+    QVector<eUBDockPaletteWidgetMode> mRegisteredModes;
+
+
+
 signals:
     void hideTab(const QString& widgetName);
     void showTab(const QString& widgetName);
 
+public slots:
+    void slot_changeMode(eUBDockPaletteWidgetMode newMode);
+
+
 protected:
     QPixmap mIconToRight;   // arrow like this: >
     QPixmap mIconToLeft;    // arrow like this: <