diff --git a/CMakeLists.txt b/CMakeLists.txt
index 265a902..15233b9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -40,7 +40,7 @@ set(ads_SRCS
 	src/DockingStateReader.cpp
     src/ElidingLabel.cpp
     src/FloatingDockContainer.cpp
-	src/FloatingOverlay.cpp
+	src/FloatingDragPreview.cpp
 	src/IconProvider.cpp
     src/ads.qrc
     src/linux/FloatingWidgetTitleBar.cpp
@@ -59,7 +59,7 @@ set(ads_INSTALL_INCLUDE
 	src/DockingStateReader.h
     src/ElidingLabel.h
     src/FloatingDockContainer.h
-	src/FloatingOverlay.h
+	src/FloatingDragPreview.h
 	src/IconProvider.h
     src/linux/FloatingWidgetTitleBar.h
 )
diff --git a/src/DockAreaTabBar.cpp b/src/DockAreaTabBar.cpp
index 33a4e88..3d44934 100644
--- a/src/DockAreaTabBar.cpp
+++ b/src/DockAreaTabBar.cpp
@@ -27,6 +27,7 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
+#include <FloatingDragPreview.h>
 #include "DockAreaTabBar.h"
 
 #include <QMouseEvent>
@@ -36,7 +37,6 @@
 #include <QApplication>
 
 #include "FloatingDockContainer.h"
-#include "FloatingOverlay.h"
 #include "DockAreaWidget.h"
 #include "DockOverlay.h"
 #include "DockManager.h"
@@ -277,8 +277,8 @@ IFloatingWidget* CDockAreaTabBar::makeAreaFloating(const QPoint& Offset, eDragSt
 	}
 	else
 	{
-		auto w = new CFloatingOverlay(d->DockArea);
-		connect(w, &CFloatingOverlay::draggingCanceled, [=]()
+		auto w = new CFloatingDragPreview(d->DockArea);
+		connect(w, &CFloatingDragPreview::draggingCanceled, [=]()
 		{
 			d->DragState = DraggingInactive;
 		});
diff --git a/src/DockContainerWidget.h b/src/DockContainerWidget.h
index f44f45d..1ac037d 100644
--- a/src/DockContainerWidget.h
+++ b/src/DockContainerWidget.h
@@ -47,8 +47,8 @@ class CDockManager;
 struct DockManagerPrivate;
 class CFloatingDockContainer;
 struct FloatingDockContainerPrivate;
-class CFloatingOverlay;
-struct FloatingOverlayPrivate;
+class CFloatingDragPreview;
+struct FloatingDragPreviewPrivate;
 class CDockingStateReader;
 
 /**
@@ -71,8 +71,8 @@ private:
 	friend class CFloatingDockContainer;
 	friend struct FloatingDockContainerPrivate;
 	friend class CDockWidget;
-	friend class CFloatingOverlay;
-	friend struct FloatingOverlayPrivate;
+	friend class CFloatingDragPreview;
+	friend struct FloatingDragPreviewPrivate;
 
 protected:
 	/**
diff --git a/src/DockManager.h b/src/DockManager.h
index 064e8a7..b948cef 100644
--- a/src/DockManager.h
+++ b/src/DockManager.h
@@ -86,8 +86,8 @@ private:
 	friend class CDockWidgetTab;
 	friend struct DockAreaWidgetPrivate;
 	friend struct DockWidgetTabPrivate;
-	friend class CFloatingOverlay;
-	friend struct FloatingOverlayPrivate;
+	friend class CFloatingDragPreview;
+	friend struct FloatingDragPreviewPrivate;
 
 protected:
 	/**
diff --git a/src/DockWidgetTab.cpp b/src/DockWidgetTab.cpp
index 9e8abf6..6c5329e 100644
--- a/src/DockWidgetTab.cpp
+++ b/src/DockWidgetTab.cpp
@@ -28,6 +28,7 @@
 //============================================================================
 //                                   INCLUDES
 //============================================================================
+#include <FloatingDragPreview.h>
 #include "ElidingLabel.h"
 #include "DockWidgetTab.h"
 
@@ -46,7 +47,6 @@
 #include "DockWidget.h"
 #include "DockAreaWidget.h"
 #include "FloatingDockContainer.h"
-#include "FloatingOverlay.h"
 #include "DockOverlay.h"
 #include "DockManager.h"
 #include "IconProvider.h"
@@ -151,8 +151,8 @@ struct DockWidgetTabPrivate
 		}
 		else
 		{
-			auto w = new CFloatingOverlay(Widget);
-			_this->connect(w, &CFloatingOverlay::draggingCanceled, [=]()
+			auto w = new CFloatingDragPreview(Widget);
+			_this->connect(w, &CFloatingDragPreview::draggingCanceled, [=]()
 			{
 				DragState = DraggingInactive;
 			});
diff --git a/src/FloatingOverlay.cpp b/src/FloatingDragPreview.cpp
similarity index 87%
rename from src/FloatingOverlay.cpp
rename to src/FloatingDragPreview.cpp
index b8a68b4..fa062af 100644
--- a/src/FloatingOverlay.cpp
+++ b/src/FloatingDragPreview.cpp
@@ -1,15 +1,14 @@
 //============================================================================
-/// \file   FloatingOverlay.cpp
+/// \file   FloatingDragPreview.cpp
 /// \author Uwe Kindler
 /// \date   26.11.2019
-/// \brief  Implementation of CFloatingOverlay
+/// \brief  Implementation of CFloatingDragPreview
 //============================================================================
 
 //============================================================================
 //                                   INCLUDES
 //============================================================================
-#include "FloatingOverlay.h"
-
+#include "FloatingDragPreview.h"
 #include <iostream>
 
 #include <QEvent>
@@ -29,9 +28,9 @@ namespace ads
 /**
  * Private data class (pimpl)
  */
-struct FloatingOverlayPrivate
+struct FloatingDragPreviewPrivate
 {
-	CFloatingOverlay *_this;
+	CFloatingDragPreview *_this;
 	QWidget* Content;
 	CDockAreaWidget* ContentSourceArea = nullptr;
 	CDockContainerWidget* ContenSourceContainer = nullptr;
@@ -46,7 +45,7 @@ struct FloatingOverlayPrivate
 	/**
 	 * Private data constructor
 	 */
-	FloatingOverlayPrivate(CFloatingOverlay *_public);
+	FloatingDragPreviewPrivate(CFloatingDragPreview *_public);
 	void updateDropOverlays(const QPoint &GlobalPos);
 
 	void setHidden(bool Value)
@@ -70,7 +69,7 @@ struct FloatingOverlayPrivate
 
 
 //============================================================================
-void FloatingOverlayPrivate::updateDropOverlays(const QPoint &GlobalPos)
+void FloatingDragPreviewPrivate::updateDropOverlays(const QPoint &GlobalPos)
 {
 	if (!_this->isVisible() || !DockManager)
 	{
@@ -163,16 +162,16 @@ void FloatingOverlayPrivate::updateDropOverlays(const QPoint &GlobalPos)
 
 
 //============================================================================
-FloatingOverlayPrivate::FloatingOverlayPrivate(CFloatingOverlay *_public) :
+FloatingDragPreviewPrivate::FloatingDragPreviewPrivate(CFloatingDragPreview *_public) :
 	_this(_public)
 {
 
 }
 
 //============================================================================
-CFloatingOverlay::CFloatingOverlay(QWidget* Content, QWidget* parent) :
+CFloatingDragPreview::CFloatingDragPreview(QWidget* Content, QWidget* parent) :
 	QWidget(parent),
-	d(new FloatingOverlayPrivate(this))
+	d(new FloatingDragPreviewPrivate(this))
 {
 	d->Content = Content;
 	setAttribute(Qt::WA_DeleteOnClose);
@@ -211,8 +210,8 @@ CFloatingOverlay::CFloatingOverlay(QWidget* Content, QWidget* parent) :
 
 
 //============================================================================
-CFloatingOverlay::CFloatingOverlay(CDockWidget* Content)
-	: CFloatingOverlay((QWidget*)Content, Content->dockManager())
+CFloatingDragPreview::CFloatingDragPreview(CDockWidget* Content)
+	: CFloatingDragPreview((QWidget*)Content, Content->dockManager())
 {
 	d->DockManager = Content->dockManager();
 	if (Content->dockAreaWidget()->openDockWidgetsCount() == 1)
@@ -225,8 +224,8 @@ CFloatingOverlay::CFloatingOverlay(CDockWidget* Content)
 
 
 //============================================================================
-CFloatingOverlay::CFloatingOverlay(CDockAreaWidget* Content)
-	: CFloatingOverlay((QWidget*)Content, Content->dockManager())
+CFloatingDragPreview::CFloatingDragPreview(CDockAreaWidget* Content)
+	: CFloatingDragPreview((QWidget*)Content, Content->dockManager())
 {
 	d->DockManager = Content->dockManager();
 	d->ContentSourceArea = Content;
@@ -236,14 +235,14 @@ CFloatingOverlay::CFloatingOverlay(CDockAreaWidget* Content)
 
 
 //============================================================================
-CFloatingOverlay::~CFloatingOverlay()
+CFloatingDragPreview::~CFloatingDragPreview()
 {
 	delete d;
 }
 
 
 //============================================================================
-void CFloatingOverlay::moveFloating()
+void CFloatingDragPreview::moveFloating()
 {
 	int BorderSize = (frameSize().width() - size().width()) / 2;
 	const QPoint moveToPos = QCursor::pos() - d->DragStartMousePosition
@@ -253,7 +252,7 @@ void CFloatingOverlay::moveFloating()
 
 
 //============================================================================
-void CFloatingOverlay::startFloating(const QPoint &DragStartMousePos,
+void CFloatingDragPreview::startFloating(const QPoint &DragStartMousePos,
     const QSize &Size, eDragState DragState, QWidget *MouseEventHandler)
 {
 	Q_UNUSED(MouseEventHandler)
@@ -267,7 +266,7 @@ void CFloatingOverlay::startFloating(const QPoint &DragStartMousePos,
 
 
 //============================================================================
-void CFloatingOverlay::moveEvent(QMoveEvent *event)
+void CFloatingDragPreview::moveEvent(QMoveEvent *event)
 {
 	QWidget::moveEvent(event);
 	d->updateDropOverlays(QCursor::pos());
@@ -275,9 +274,9 @@ void CFloatingOverlay::moveEvent(QMoveEvent *event)
 
 
 //============================================================================
-void CFloatingOverlay::finishDragging()
+void CFloatingDragPreview::finishDragging()
 {
-	ADS_PRINT("CFloatingOverlay::finishDragging");
+	ADS_PRINT("CFloatingDragPreview::finishDragging");
 	auto DockDropArea = d->DockManager->dockAreaOverlay()->dropAreaUnderCursor();
 	auto ContainerDropArea = d->DockManager->containerOverlay()->dropAreaUnderCursor();
 	bool DropPossible = (DockDropArea != InvalidDockWidgetArea) || (ContainerDropArea != InvalidDockWidgetArea);
@@ -317,7 +316,7 @@ void CFloatingOverlay::finishDragging()
 
 
 //============================================================================
-void CFloatingOverlay::paintEvent(QPaintEvent* event)
+void CFloatingDragPreview::paintEvent(QPaintEvent* event)
 {
 	Q_UNUSED(event);
 	if (d->Hidden)
@@ -351,7 +350,7 @@ void CFloatingOverlay::paintEvent(QPaintEvent* event)
 
 
 //============================================================================
-void CFloatingOverlay::keyPressEvent(QKeyEvent *event)
+void CFloatingDragPreview::keyPressEvent(QKeyEvent *event)
 {
 	Super::keyPressEvent(event);
 	if (event->key() == Qt::Key_Escape)
@@ -362,7 +361,7 @@ void CFloatingOverlay::keyPressEvent(QKeyEvent *event)
 
 
 //============================================================================
-void CFloatingOverlay::onApplicationStateChanged(Qt::ApplicationState state)
+void CFloatingDragPreview::onApplicationStateChanged(Qt::ApplicationState state)
 {
 	if (state != Qt::ApplicationActive)
 	{
@@ -378,4 +377,4 @@ void CFloatingOverlay::onApplicationStateChanged(Qt::ApplicationState state)
 } // namespace ads
 
 //---------------------------------------------------------------------------
-// EOF FloatingOverlay.cpp
+// EOF FloatingDragPreview.cpp
diff --git a/src/FloatingOverlay.h b/src/FloatingDragPreview.h
similarity index 77%
rename from src/FloatingOverlay.h
rename to src/FloatingDragPreview.h
index c9af8c7..07b68ea 100644
--- a/src/FloatingOverlay.h
+++ b/src/FloatingDragPreview.h
@@ -1,10 +1,10 @@
-#ifndef FloatingOverlayH
-#define FloatingOverlayH
+#ifndef FloatingDragPreviewH
+#define FloatingDragPreviewH
 //============================================================================
-/// \file   FloatingOverlay.h
+/// \file   FloatingDragPreview.h
 /// \author Uwe Kindler
 /// \date   26.11.2019
-/// \brief  Declaration of CFloatingOverlay
+/// \brief  Declaration of CFloatingDragPreview
 //============================================================================
 
 //============================================================================
@@ -17,7 +17,7 @@ namespace ads
 {
 class CDockWidget;
 class CDockAreaWidget;
-struct FloatingOverlayPrivate;
+struct FloatingDragPreviewPrivate;
 
 /**
  * A floating overlay is a temporary floating widget that is just used to
@@ -25,14 +25,17 @@ struct FloatingOverlayPrivate;
  * This widget is used as a placeholder for drag operations for non-opaque
  * docking
  */
-class CFloatingOverlay : public QWidget, public IFloatingWidget
+class CFloatingDragPreview : public QWidget, public IFloatingWidget
 {
 	Q_OBJECT
 private:
-	FloatingOverlayPrivate* d;
-	friend class FloatingOverlayPrivate;
+	FloatingDragPreviewPrivate* d;
+	friend class FloatingDragPreviewPrivate;
 
 private slots:
+	/**
+	 * Cancel non opaque undocking if application becomes inactive
+	 */
 	void onApplicationStateChanged(Qt::ApplicationState state);
 
 protected:
@@ -46,12 +49,15 @@ protected:
 	 */
 	virtual void paintEvent(QPaintEvent *e) override;
 
+	/**
+	 * Cancel non opaque undocking with escape key
+	 */
 	virtual void keyPressEvent(QKeyEvent *event) override;
 
 	/**
 	 * The content is a DockArea or a DockWidget
 	 */
-	CFloatingOverlay(QWidget* Content, QWidget* parent);
+	CFloatingDragPreview(QWidget* Content, QWidget* parent);
 
 public:
 	using Super = QWidget;
@@ -59,18 +65,18 @@ public:
 	/**
 	 * Creates an instance for undocking the DockWidget in Content parameter
 	 */
-	CFloatingOverlay(CDockWidget* Content);
+	CFloatingDragPreview(CDockWidget* Content);
 
 	/**
 	 * Creates an instance for undocking the DockArea given in Content
 	 * parameters
 	 */
-	CFloatingOverlay(CDockAreaWidget* Content);
+	CFloatingDragPreview(CDockAreaWidget* Content);
 
 	/**
 	 * Delete private data
 	 */
-	~CFloatingOverlay();
+	~CFloatingDragPreview();
 
 
 public: // implements IFloatingWidget -----------------------------------------
@@ -102,5 +108,5 @@ signals:
 } // namespace ads
 
 //---------------------------------------------------------------------------
-#endif // FloatingOverlayH
+#endif // FloatingDragPreviewH
 
diff --git a/src/src.pro b/src/src.pro
index e368232..755c7e5 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -38,7 +38,7 @@ HEADERS += \
     DockWidgetTab.h \ 
     DockingStateReader.h \
     FloatingDockContainer.h \
-    FloatingOverlay.h \
+    FloatingDragPreview.h \
     DockOverlay.h \
     DockSplitter.h \
     DockAreaTitleBar.h \
@@ -56,7 +56,7 @@ SOURCES += \
     DockingStateReader.cpp \
     DockWidgetTab.cpp \
     FloatingDockContainer.cpp \
-    FloatingOverlay.cpp \
+    FloatingDragPreview.cpp \
     DockOverlay.cpp \
     DockSplitter.cpp \
     DockAreaTitleBar.cpp \