--- a/gui//src/FileEditorMdiSubWindow.cpp
+++ b/gui//src/FileEditorMdiSubWindow.cpp
@@ -35,6 +35,12 @@
     m_simpleEditor->load(fileName);
 }
 
+void FileEditorMdiSubWindow::installEventFilter(QObject *object) {
+    QMdiSubWindow::installEventFilter(object);
+    m_numberedTextView->installEventFilter(object);
+    m_simpleEditor->installEventFilter(object);
+}
+
 void FileEditorMdiSubWindow::newFile() {
     if(m_modified) {
         int decision

--- a/gui//src/FileEditorMdiSubWindow.h
+++ b/gui//src/FileEditorMdiSubWindow.h
@@ -31,6 +31,8 @@
     FileEditorMdiSubWindow(QWidget *parent = 0);
     void loadFile(QString fileName);
 
+    void installEventFilter(QObject *object);
+
 public slots:
     void newFile();
     void saveFile();

--- a/gui//src/MainWindow.cpp
+++ b/gui//src/MainWindow.cpp
@@ -31,7 +31,7 @@
       m_isRunning(true) {
     QDesktopServices desktopServices;
     m_settingsFile = desktopServices.storageLocation(QDesktopServices::HomeLocation) + "/.quint/settings.ini";
-    constructWindow();
+    construct();
     establishOctaveLink();
 }
 
@@ -46,11 +46,13 @@
         m_openedFiles->addSubWindow(subWindow);
         subWindow->setWindowTitle(fileName);
         subWindow->showMaximized();
+        subWindow->installEventFilter(m_centralTabWidget);
     } else {
         FileEditorMdiSubWindow *subWindow = new FileEditorMdiSubWindow(m_openedFiles);
         m_openedFiles->addSubWindow(subWindow);
         subWindow->loadFile(fileName);
         subWindow->showMaximized();
+        subWindow->installEventFilter(m_centralTabWidget);
     }
     m_centralTabWidget->setCurrentWidget(m_openedFiles);
 }
@@ -114,10 +116,11 @@
     settings.setValue("MainWindow/windowState", saveState());
 }
 
-void MainWindow::constructWindow() {
+void MainWindow::construct() {
     setWindowIcon(QIcon("../media/quint_icon_small.png"));
 
     QStyle *style = QApplication::style();
+    m_centralTabWidget = new TabWidgetWithShortcuts(this);
     m_octaveTerminal = new OctaveTerminal(this);
     m_generalPurposeToolbar = new QToolBar(tr("Octave Toolbar"), this);
     m_variablesDockWidget = new VariablesDockWidget(this);
@@ -127,12 +130,18 @@
     m_statusBar = new QStatusBar(this);
     m_browserWidget = new BrowserWidget(this);
     m_serviceWidget = new BrowserWidget(this);
-    m_centralTabWidget = new QTabWidget(this);
+
     m_centralTabWidget->addTab(m_octaveTerminal, tr("Command Window"));
     m_centralTabWidget->addTab(m_openedFiles, tr("File Editor"));
     m_centralTabWidget->addTab(m_browserWidget, tr("Documentation"));
     m_centralTabWidget->addTab(m_serviceWidget, tr("Service"));
 
+    m_octaveTerminal->installEventFilter(m_centralTabWidget);
+    m_octaveTerminal->installEventFilterOnDisplay(m_centralTabWidget);
+    m_openedFiles->installEventFilter(m_centralTabWidget);
+    m_browserWidget->installEventFilter(m_centralTabWidget);
+    m_serviceWidget->installEventFilter(m_centralTabWidget);
+
     // TODO: Add meaningfull toolbar items.
     QAction *commandAction = new QAction(style->standardIcon(QStyle::SP_CommandLink),
         "", m_generalPurposeToolbar);

--- a/gui//src/MainWindow.h
+++ b/gui//src/MainWindow.h
@@ -25,6 +25,7 @@
 #include <QMdiArea>
 #include <QStatusBar>
 #include <QToolBar>
+#include <QQueue>
 #include "OctaveTerminal.h"
 #include "OctaveLink.h"
 #include "VariablesDockWidget.h"
@@ -79,6 +80,65 @@
 class OctaveMainThread;
 class OctaveCallbackThread;
 
+class TabWidgetWithShortcuts : public QTabWidget {
+public:
+    TabWidgetWithShortcuts(QWidget *parent = 0)
+        : QTabWidget(parent),
+          m_showingShortcuts(false) {
+        setFocusPolicy(Qt::NoFocus);
+    }
+
+protected:
+    bool eventFilter(QObject *object, QEvent *event) {
+        if(event->type() == QEvent::KeyPress) {
+            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
+            if(keyEvent->modifiers() == Qt::ControlModifier) {
+                showShortcuts();
+                switch(keyEvent->key()) {
+                case Qt::Key_1: setCurrentIndex(0); return true;
+                case Qt::Key_2: setCurrentIndex(1); return true;
+                case Qt::Key_3: setCurrentIndex(2); return true;
+                case Qt::Key_4: setCurrentIndex(3); return true;
+                };
+            }
+        } else if(event->type() == QEvent::KeyRelease) {
+            QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
+            if(keyEvent->modifiers() != Qt::ControlModifier) {
+                hideShortcuts();
+            }
+        }
+        return QTabWidget::eventFilter(object, event);
+    }
+
+private:
+    void showShortcuts() {
+        if(m_showingShortcuts)
+            return;
+
+        int tabCount = count();
+        for(int tabIndex = 0; tabIndex < tabCount; tabIndex++) {
+            m_backuppedTabTitles.push_back(tabText(tabIndex));
+            setTabText(tabIndex, QString("%1 [%2]").arg(tabText(tabIndex)).arg(tabIndex + 1));
+        }
+
+        m_showingShortcuts = true;
+    }
+
+    void hideShortcuts() {
+        if(!m_showingShortcuts)
+            return;
+        int tabCount = count();
+        for(int tabIndex = 0; tabIndex < tabCount; tabIndex++) {
+            setTabText(tabIndex, m_backuppedTabTitles.front());
+            m_backuppedTabTitles.pop_front();
+        }
+        m_showingShortcuts = false;
+    }
+
+    bool m_showingShortcuts;
+    QQueue<QString> m_backuppedTabTitles;
+};
+
 /**
   * \class MainWindow
   *
@@ -111,14 +171,14 @@
     void writeSettings();
 
 private:
-    void constructWindow();
+    void construct();
     void establishOctaveLink();
     OctaveTerminal *m_octaveTerminal;
     VariablesDockWidget *m_variablesDockWidget;
     HistoryDockWidget *m_historyDockWidget;
     FilesDockWidget *m_filesDockWidget;
     QMdiArea *m_openedFiles;
-    QTabWidget *m_centralTabWidget;
+    TabWidgetWithShortcuts *m_centralTabWidget;
     QStatusBar *m_statusBar;
     QToolBar *m_generalPurposeToolbar;
     BrowserWidget *m_browserWidget;

--- a/gui//src/NumberedCodeEdit.cpp
+++ b/gui//src/NumberedCodeEdit.cpp
@@ -213,7 +213,7 @@
 	setLineWidth( 2 );
 	
 	view=textEdit;
-	view->installEventFilter( this );
+        view->installEventFilter( this );
 	
 	connect( view->document(), SIGNAL(contentsChange(int,int,int)), this, SLOT(textChanged(int,int,int)) );
 	

--- a/gui//src/QTerminalWidget.cpp
+++ b/gui//src/QTerminalWidget.cpp
@@ -75,11 +75,10 @@
     if(startnow && m_impl->m_session) {
 	m_impl->m_session->run();
     }
-    
-    this->setFocus(Qt::OtherFocusReason);
+
+    setFocus(Qt::OtherFocusReason);
     m_impl->m_terminalDisplay->resize(this->size());
-    
-    this->setFocusProxy(m_impl->m_terminalDisplay);
+    setFocusProxy(m_impl->m_terminalDisplay);
 }
 
 void QTerminalWidget::startShellProgram()
@@ -174,6 +173,10 @@
     m_impl->m_session->sendText(text); 
 }
 
+void QTerminalWidget::installEventFilterOnDisplay(QObject *object) {
+    m_impl->m_terminalDisplay->installEventFilter(object);
+}
+
 void QTerminalWidget::resizeEvent(QResizeEvent*)
 {
     m_impl->m_terminalDisplay->resize(this->size());

--- a/gui//src/QTerminalWidget.h
+++ b/gui//src/QTerminalWidget.h
@@ -70,6 +70,9 @@
     
     /** Send some text to the terminal. */
     void sendText(const QString &text);
+
+    /** Installs an event filter onto the display. */
+    void installEventFilterOnDisplay(QObject *object);
             
 signals:
     /** Emitted, when the current program has finished. */

--- a/gui//src/TerminalDisplay.cpp
+++ b/gui//src/TerminalDisplay.cpp
@@ -2920,7 +2920,7 @@
 : QObject(parent)
 , _timerId(0)
 {
-    parent->installEventFilter(this);
+    //parent->installEventFilter(this);
 }
 void AutoScrollHandler::timerEvent(QTimerEvent* event)
 {