diff --git a/src/core/coreconfig.cpp b/src/core/coreconfig.cpp
index 7c2d7cc6..56c44289 100644
--- a/src/core/coreconfig.cpp
+++ b/src/core/coreconfig.cpp
@@ -41,10 +41,6 @@ void CoreConfig::init(const QJsonObject &p_app,
     if (m_toolBarIconSize <= 0) {
         m_toolBarIconSize = 16;
     }
-
-    if (!isUndefinedKey(appObj, userObj, "minimize_to_system_tray")) {
-        m_minimizeToSystemTray = READBOOL(QStringLiteral("minimize_to_system_tray")) ? 1 : 0;
-    }
 }
 
 QJsonObject CoreConfig::toJson() const
@@ -54,9 +50,6 @@ QJsonObject CoreConfig::toJson() const
     obj[QStringLiteral("locale")] = m_locale;
     obj[QStringLiteral("shortcuts")] = saveShortcuts();
     obj[QStringLiteral("toolbar_icon_size")] = m_toolBarIconSize;
-    if (m_minimizeToSystemTray != -1) {
-        obj[QStringLiteral("minimize_to_system_tray")] = m_minimizeToSystemTray > 0;
-    }
     return obj;
 }
 
@@ -130,11 +123,3 @@ void CoreConfig::setToolBarIconSize(int p_size)
     Q_ASSERT(p_size > 0);
     updateConfig(m_toolBarIconSize, p_size, this);
 }
-
-int CoreConfig::getMinimizeToSystemTray() const {
-    return m_minimizeToSystemTray;
-}
-
-void CoreConfig::setMinimizeToSystemTray(bool state){
-    updateConfig(m_minimizeToSystemTray, int(state), this);
-}
diff --git a/src/core/coreconfig.h b/src/core/coreconfig.h
index 533a74d4..71d61806 100644
--- a/src/core/coreconfig.h
+++ b/src/core/coreconfig.h
@@ -48,9 +48,6 @@ namespace vnotex
         int getToolBarIconSize() const;
         void setToolBarIconSize(int p_size);
 
-        int getMinimizeToSystemTray() const;
-        void setMinimizeToSystemTray(bool state);
-
         static const QStringList &getAvailableLocales();
 
     private:
@@ -70,12 +67,6 @@ namespace vnotex
         // Icon size of MainWindow tool bar.
         int m_toolBarIconSize = 16;
 
-        // Whether to minimize to tray.
-        // -1 for prompting for user;
-        // 0 for disabling minimizing to system tray;
-        // 1 for enabling minimizing to system tray;
-        int m_minimizeToSystemTray = -1;
-
         static QStringList s_availableLocales;
     };
 } // ns vnotex
diff --git a/src/core/global.h b/src/core/global.h
index 1c9962a3..88a727c9 100644
--- a/src/core/global.h
+++ b/src/core/global.h
@@ -73,6 +73,8 @@ namespace vnotex
     };
     Q_DECLARE_FLAGS(FindOptions, FindOption);
 
+    enum { RESTART_EXIT_CODE = 1000 };
+
 } // ns vnotex
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(vnotex::FindOptions);
diff --git a/src/core/iconfig.h b/src/core/iconfig.h
index daf0db78..27412734 100644
--- a/src/core/iconfig.h
+++ b/src/core/iconfig.h
@@ -130,10 +130,13 @@ namespace vnotex
                                    const QJsonObject &p_user,
                                    const QString &p_key)
         {
-            if (p_user.find(p_key) == p_user.end() && p_default.find(p_key) == p_default.end()) {
-                return true;
-            }
-            return false;
+            return !p_default.contains(p_key) && !p_user.contains(p_key);
+        }
+
+        static bool isUndefinedKey(const QJsonObject &p_obj,
+                                   const QString &p_key)
+        {
+            return !p_obj.contains(p_key);
         }
 
         template <typename T>
diff --git a/src/core/sessionconfig.cpp b/src/core/sessionconfig.cpp
index 29c6df46..4a0273d3 100644
--- a/src/core/sessionconfig.cpp
+++ b/src/core/sessionconfig.cpp
@@ -72,7 +72,7 @@ void SessionConfig::loadCore(const QJsonObject &p_session)
         m_openGL = stringToOpenGL(option);
     }
 
-    if (coreObj.contains(QStringLiteral("system_title_bar"))) {
+    if (!isUndefinedKey(coreObj, QStringLiteral("system_title_bar"))) {
         m_systemTitleBarEnabled = readBool(coreObj, QStringLiteral("system_title_bar"));
     } else {
         // Enable system title bar on macOS by default.
@@ -82,6 +82,10 @@ void SessionConfig::loadCore(const QJsonObject &p_session)
         m_systemTitleBarEnabled = false;
 #endif
     }
+
+    if (!isUndefinedKey(coreObj, QStringLiteral("minimize_to_system_tray"))) {
+        m_minimizeToSystemTray = readBool(coreObj, QStringLiteral("minimize_to_system_tray")) ? 1 : 0;
+    }
 }
 
 QJsonObject SessionConfig::saveCore() const
@@ -91,6 +95,9 @@ QJsonObject SessionConfig::saveCore() const
     coreObj[QStringLiteral("current_notebook_root_folder_path")] = m_currentNotebookRootFolderPath;
     coreObj[QStringLiteral("opengl")] = openGLToString(m_openGL);
     coreObj[QStringLiteral("system_title_bar")] = m_systemTitleBarEnabled;
+    if (m_minimizeToSystemTray != -1) {
+        coreObj[QStringLiteral("minimize_to_system_tray")] = m_minimizeToSystemTray > 0;
+    }
     return coreObj;
 }
 
@@ -260,3 +267,13 @@ void SessionConfig::setSystemTitleBarEnabled(bool p_enabled)
 {
     updateConfig(m_systemTitleBarEnabled, p_enabled, this);
 }
+
+int SessionConfig::getMinimizeToSystemTray() const
+{
+    return m_minimizeToSystemTray;
+}
+
+void SessionConfig::setMinimizeToSystemTray(bool p_enabled)
+{
+    updateConfig(m_minimizeToSystemTray, p_enabled ? 1 : 0, this);
+}
diff --git a/src/core/sessionconfig.h b/src/core/sessionconfig.h
index d91d9a26..5b6dcf22 100644
--- a/src/core/sessionconfig.h
+++ b/src/core/sessionconfig.h
@@ -79,6 +79,9 @@ namespace vnotex
         static QString openGLToString(OpenGL p_option);
         static OpenGL stringToOpenGL(const QString &p_str);
 
+        int getMinimizeToSystemTray() const;
+        void setMinimizeToSystemTray(bool p_enabled);
+
     private:
         void loadCore(const QJsonObject &p_session);
 
@@ -105,6 +108,12 @@ namespace vnotex
 
         // Whether use system's title bar or not.
         bool m_systemTitleBarEnabled = false;
+
+        // Whether to minimize to tray.
+        // -1 for prompting for user;
+        // 0 for disabling minimizing to system tray;
+        // 1 for enabling minimizing to system tray.
+        int m_minimizeToSystemTray = -1;
     };
 } // ns vnotex
 
diff --git a/src/core/singleinstanceguard.cpp b/src/core/singleinstanceguard.cpp
index f16e6029..daeaeed6 100644
--- a/src/core/singleinstanceguard.cpp
+++ b/src/core/singleinstanceguard.cpp
@@ -23,8 +23,6 @@ bool SingleInstanceGuard::tryRun()
     // this will attach to the old segment, then exit, freeing the old segment.
     if (m_sharedMemory.attach()) {
         qInfo() << "another instance is running";
-        // So try to show it?
-        showInstance();
         return false;
     }
 
diff --git a/src/data/core/core.qrc b/src/data/core/core.qrc
index e348781a..46ba2be0 100644
--- a/src/data/core/core.qrc
+++ b/src/data/core/core.qrc
@@ -74,5 +74,7 @@
         <file>icons/find_replace_editor.svg</file>
         <file>logo/vnote.svg</file>
         <file>logo/vnote.png</file>
+        <file>logo/256x256/vnote.png</file>
+        <file>logo/vnote_mono.png</file>
     </qresource>
 </RCC>
diff --git a/src/data/core/logo/vnote_mono.png b/src/data/core/logo/vnote_mono.png
new file mode 100644
index 00000000..bcea9434
Binary files /dev/null and b/src/data/core/logo/vnote_mono.png differ
diff --git a/src/main.cpp b/src/main.cpp
index b0156529..a4c5e13e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -8,6 +8,7 @@
 #include <QOpenGLContext>
 #include <QDateTime>
 #include <QSysInfo>
+#include <QProcess>
 
 #include <core/configmgr.h>
 #include <core/mainconfig.h>
@@ -16,13 +17,12 @@
 #include <core/singleinstanceguard.h>
 #include <core/vnotex.h>
 #include <core/logger.h>
+#include <core/global.h>
 #include <widgets/mainwindow.h>
 #include <QWebEngineSettings>
 #include <core/exception.h>
 #include <widgets/messageboxhelper.h>
 
-#include <QProcess>
-
 using namespace vnotex;
 
 void loadTranslators(QApplication &p_app);
@@ -120,7 +120,7 @@ int main(int argc, char *argv[])
 
     loadTranslators(app);
 
-    MainWindow window(nullptr);
+    MainWindow window;
 
     window.show();
     VNoteX::getInst().getThemeMgr().setBaseBackground(window.palette().color(QPalette::Base));
@@ -129,7 +129,7 @@ int main(int argc, char *argv[])
 
     int ret = app.exec();
     if (ret == RESTART_EXIT_CODE) {
-        // Ask to restart VNote.
+        // Asked to restart VNote.
         guard.exit();
         QProcess::startDetached(qApp->applicationFilePath(), QStringList());
         return 0;
diff --git a/src/widgets/dialogs/settings/editorpage.cpp b/src/widgets/dialogs/settings/editorpage.cpp
index 49d8958b..9624f928 100644
--- a/src/widgets/dialogs/settings/editorpage.cpp
+++ b/src/widgets/dialogs/settings/editorpage.cpp
@@ -43,7 +43,7 @@ void EditorPage::setupUI()
         m_toolBarIconSizeSpinBox->setRange(1, 48);
         m_toolBarIconSizeSpinBox->setSingleStep(1);
 
-        const QString label(tr("Toolbar icon size:"));
+        const QString label(tr("Tool bar icon size:"));
         mainLayout->addRow(label, m_toolBarIconSizeSpinBox);
         addSearchItem(label, m_toolBarIconSizeSpinBox->toolTip(), m_toolBarIconSizeSpinBox);
         connect(m_toolBarIconSizeSpinBox, QOverload<int>::of(&QSpinBox::valueChanged),
diff --git a/src/widgets/dialogs/settings/editorpage.h b/src/widgets/dialogs/settings/editorpage.h
index 8e39e791..5f53b22f 100644
--- a/src/widgets/dialogs/settings/editorpage.h
+++ b/src/widgets/dialogs/settings/editorpage.h
@@ -28,6 +28,7 @@ namespace vnotex
         void setupUI();
 
         QComboBox *m_autoSavePolicyComboBox = nullptr;
+
         QSpinBox *m_toolBarIconSizeSpinBox = nullptr;
     };
 }
diff --git a/src/widgets/dialogs/settings/generalpage.cpp b/src/widgets/dialogs/settings/generalpage.cpp
index d44e2e16..74b0ddee 100644
--- a/src/widgets/dialogs/settings/generalpage.cpp
+++ b/src/widgets/dialogs/settings/generalpage.cpp
@@ -57,21 +57,23 @@ void GeneralPage::setupUI()
     }
 #endif
 
-#if not defined(Q_OS_MACOS)
+#if !defined(Q_OS_MACOS)
     {
-        m_systemTrayCheckBox = WidgetsFactory::createCheckBox("System tray");
+        const QString label(tr("Minimize to system tray"));
+        m_systemTrayCheckBox = WidgetsFactory::createCheckBox(label, this);
+        m_systemTrayCheckBox->setToolTip(tr("Minimize to system tray when closing"));
         mainLayout->addRow(m_systemTrayCheckBox);
-
+        addSearchItem(label, m_systemTrayCheckBox->toolTip(), m_systemTrayCheckBox);
         connect(m_systemTrayCheckBox, &QCheckBox::stateChanged,
                 this, &GeneralPage::pageIsChanged);
     }
 #endif
-
 }
 
 void GeneralPage::loadInternal()
 {
     const auto &coreConfig = ConfigMgr::getInst().getCoreConfig();
+    const auto &sessionConfig = ConfigMgr::getInst().getSessionConfig();
 
     {
         int idx = m_localeComboBox->findData(coreConfig.getLocale());
@@ -80,22 +82,21 @@ void GeneralPage::loadInternal()
     }
 
     if (m_openGLComboBox) {
-        const auto &sessionConfig = ConfigMgr::getInst().getSessionConfig();
         int idx = m_openGLComboBox->findData(sessionConfig.getOpenGL());
         Q_ASSERT(idx != -1);
         m_openGLComboBox->setCurrentIndex(idx);
     }
 
-    if(m_systemTrayCheckBox){
-        auto toTray = coreConfig.getMinimizeToSystemTray();
-        if(toTray)
-            m_systemTrayCheckBox->setChecked(true);
+    if (m_systemTrayCheckBox) {
+        int toTray = sessionConfig.getMinimizeToSystemTray();
+        m_systemTrayCheckBox->setChecked(toTray > 0);
     }
 }
 
 void GeneralPage::saveInternal()
 {
     auto &coreConfig = ConfigMgr::getInst().getCoreConfig();
+    auto &sessionConfig = ConfigMgr::getInst().getSessionConfig();
 
     {
         auto locale = m_localeComboBox->currentData().toString();
@@ -103,13 +104,13 @@ void GeneralPage::saveInternal()
     }
 
     if (m_openGLComboBox) {
-        auto &sessionConfig = ConfigMgr::getInst().getSessionConfig();
         int opt = m_openGLComboBox->currentData().toInt();
         sessionConfig.setOpenGL(static_cast<SessionConfig::OpenGL>(opt));
     }
 
-    if(m_systemTrayCheckBox) {
-        coreConfig.setMinimizeToSystemTray(m_systemTrayCheckBox->isChecked());
+    if (m_systemTrayCheckBox) {
+        // This will override the -1 state. That is fine.
+        sessionConfig.setMinimizeToSystemTray(m_systemTrayCheckBox->isChecked());
     }
 }
 
diff --git a/src/widgets/dialogs/settings/generalpage.h b/src/widgets/dialogs/settings/generalpage.h
index 90717e6d..af4e580e 100644
--- a/src/widgets/dialogs/settings/generalpage.h
+++ b/src/widgets/dialogs/settings/generalpage.h
@@ -29,7 +29,6 @@ namespace vnotex
         QComboBox *m_openGLComboBox = nullptr;
 
         QCheckBox *m_systemTrayCheckBox = nullptr;
-
     };
 }
 
diff --git a/src/widgets/mainwindow.cpp b/src/widgets/mainwindow.cpp
index f15af38e..18a939ea 100644
--- a/src/widgets/mainwindow.cpp
+++ b/src/widgets/mainwindow.cpp
@@ -16,8 +16,7 @@
 #include <QApplication>
 #include <QShortcut>
 #include <QSystemTrayIcon>
-#include <QMenu>
-#include <QIcon>
+#include <QWindowStateChangeEvent>
 
 #include "toolbox.h"
 #include "notebookexplorer.h"
@@ -30,12 +29,14 @@
 #include <core/coreconfig.h>
 #include <core/events.h>
 #include <core/fileopenparameters.h>
+#include <core/global.h>
 #include <widgets/dialogs/scrolldialog.h>
 #include "viewwindow.h"
 #include "outlineviewer.h"
 #include <utils/widgetutils.h>
 #include "navigationmodemgr.h"
-#include <widgets/messageboxhelper.h>
+#include "messageboxhelper.h"
+#include "systemtrayhelper.h"
 
 #include <vtoolbar.h>
 
@@ -50,18 +51,11 @@ MainWindow::MainWindow(QWidget *p_parent)
 
     setupUI();
 
-    initSystemTrayIcon();
-
     setupShortcuts();
 
     loadStateAndGeometry();
 
-#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
-    QApplication::setQuitOnLastWindowClosed(false);
-#endif
-
-    // The signal is particularly useful if your application has
-    // to do some last-second cleanup.
+    // The signal is particularly useful if your application has to do some last-second cleanup.
     // Note that no user interaction is possible in this state.
     connect(qApp, &QCoreApplication::aboutToQuit,
             this, &MainWindow::closeOnQuit);
@@ -91,6 +85,7 @@ void MainWindow::setupUI()
     setupDocks();
     setupToolBar();
     setupStatusBar();
+    setupSystemTray();
 
     activateDock(m_docks[DockIndex::NavigationDock]);
 }
@@ -289,36 +284,27 @@ void MainWindow::setupNotebookExplorer(QWidget *p_parent)
 
 void MainWindow::closeEvent(QCloseEvent *p_event)
 {
-    // TODO: support minimized to system tray.
+    const int toTray = ConfigMgr::getInst().getSessionConfig().getMinimizeToSystemTray();
+    bool isExit = m_requestQuit > -1 || toTray == 0;
+    const int exitCode = m_requestQuit;
+    m_requestQuit = -1;
 
-    auto toTray = ConfigMgr::getInst().getCoreConfig().getMinimizeToSystemTray();
-    bool isExit = m_requestQuit;
-    m_requestQuit = 0;
-
-    if (isVisible()) {
-        saveStateAndGeometry();
-    }
-
-#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
+#if defined(Q_OS_MACOS)
     // Do not support minimized to tray on macOS.
-    if (!isExit) {
-        p_event->accept();
-        return;
-    }
+    isExit = true;
 #endif
 
     if(!isExit && toTray == -1){
         int ret =  MessageBoxHelper::questionYesNo(MessageBoxHelper::Question,
-                                                   tr("Close VNote"),
-                                                   tr("Do you want to minimize VNote to system tray "
-                                                      "instead of quitting it when closing VNote?"),
+                                                   tr("Close %1").arg(qApp->applicationName()),
+                                                   tr("Do you want to minimize %1 to system tray "
+                                                      "instead of quitting when closing %1?").arg(qApp->applicationName()),
                                                    tr("You could change the option in Settings later."),
                                                    this);
         if (ret == QMessageBox::Yes) {
-            ConfigMgr::getInst().getCoreConfig().setMinimizeToSystemTray(true);
-            hide();
+            ConfigMgr::getInst().getSessionConfig().setMinimizeToSystemTray(true);
         } else if (ret == QMessageBox::No) {
-            ConfigMgr::getInst().getCoreConfig().setMinimizeToSystemTray(false);
+            ConfigMgr::getInst().getSessionConfig().setMinimizeToSystemTray(false);
             isExit = true;
         } else {
             p_event->ignore();
@@ -326,10 +312,11 @@ void MainWindow::closeEvent(QCloseEvent *p_event)
         }
     }
 
-    if(isExit || toTray == 0 || !m_trayIcon->isVisible()){
-        // really to quit, process workspace
-        // TODO: process workspace
+    if (isVisible()) {
+        saveStateAndGeometry();
+    }
 
+    if (isExit || !m_trayIcon->isVisible()) {
         // Signal out the close event.
         auto event = QSharedPointer<Event>::create();
         event->m_response = true;
@@ -341,8 +328,8 @@ void MainWindow::closeEvent(QCloseEvent *p_event)
         }
 
         QMainWindow::closeEvent(p_event);
-        qApp->quit();
-    }else {
+        qApp->exit(exitCode > -1 ? exitCode : 0);
+    } else {
         hide();
         p_event->ignore();
     }
@@ -523,7 +510,7 @@ void MainWindow::setStayOnTop(bool p_enabled)
     bool shown = isVisible();
     Qt::WindowFlags flags = windowFlags();
 
-    Qt::WindowFlags magicFlag = Qt::WindowStaysOnTopHint;
+    const Qt::WindowFlags magicFlag = Qt::WindowStaysOnTopHint;
     if (p_enabled) {
         setWindowFlags(flags | magicFlag);
     } else {
@@ -535,42 +522,49 @@ void MainWindow::setStayOnTop(bool p_enabled)
     }
 }
 
-void MainWindow::initSystemTrayIcon(){
-    QMenu *menu = new QMenu(this);
-    QAction *showMainWindowAct = menu->addAction(tr("Show VNote"));
-    connect(showMainWindowAct, &QAction::triggered,
-            this, &MainWindow::show);
-
-    QAction *exitAct = menu->addAction(tr("Quit"));
-    connect(exitAct, &QAction::triggered,
-            this, [this](){
-                this->m_requestQuit = 1;
-                this->close();
-                });
-
-    QIcon sysIcon(":/vnotex/data/core/logo/vnote.png");
-
-#if defined(Q_OS_MACOS) || defined(Q_OS_MAC)
-    sysIcon.setIsMask(true);
-#endif
-
-    m_trayIcon = new QSystemTrayIcon(sysIcon, this);
-    m_trayIcon->setToolTip(tr("VNote"));
-    m_trayIcon->setContextMenu(menu);
-
-    connect(m_trayIcon, &QSystemTrayIcon::activated,
-            this, [this](QSystemTrayIcon::ActivationReason p_reason){
-#if !defined(Q_OS_MACOS) && !defined(Q_OS_MAC)
-                if (p_reason == QSystemTrayIcon::Trigger) {
-                    this->show();
-                    this->activateWindow();
-                }
-#endif
-            });
-
+void MainWindow::setupSystemTray()
+{
+    m_trayIcon = SystemTrayHelper::setupSystemTray(this);
     m_trayIcon->show();
 }
 
-void MainWindow::restart(){
-    QCoreApplication::exit(RESTART_EXIT_CODE);
+void MainWindow::restart()
+{
+    m_requestQuit = RESTART_EXIT_CODE;
+    close();
+}
+
+void MainWindow::changeEvent(QEvent *p_event)
+{
+    if (p_event->type() == QEvent::WindowStateChange) {
+        QWindowStateChangeEvent *eve = static_cast<QWindowStateChangeEvent *>(p_event);
+        m_windowOldState = eve->oldState();
+    }
+
+    QMainWindow::changeEvent(p_event);
+}
+
+void MainWindow::showMainWindow()
+{
+    if (isMinimized()) {
+        if (m_windowOldState & Qt::WindowMaximized) {
+            showMaximized();
+        } else if (m_windowOldState & Qt::WindowFullScreen) {
+            showFullScreen();
+        } else {
+            showNormal();
+        }
+    } else {
+        show();
+        // Need to call raise() in macOS.
+        raise();
+    }
+
+    activateWindow();
+}
+
+void MainWindow::quitApp()
+{
+    m_requestQuit = 0;
+    close();
 }
diff --git a/src/widgets/mainwindow.h b/src/widgets/mainwindow.h
index 1b739eeb..3fd5bea2 100644
--- a/src/widgets/mainwindow.h
+++ b/src/widgets/mainwindow.h
@@ -7,8 +7,6 @@
 #include "toolbarhelper.h"
 #include "statusbarhelper.h"
 
-#define RESTART_EXIT_CODE   1000
-
 class QDockWidget;
 class QSystemTrayIcon;
 
@@ -47,6 +45,10 @@ namespace vnotex
 
         void restart();
 
+        void showMainWindow();
+
+        void quitApp();
+
     signals:
         void mainWindowStarted();
 
@@ -61,6 +63,8 @@ namespace vnotex
     protected:
         void closeEvent(QCloseEvent *p_event) Q_DECL_OVERRIDE;
 
+        void changeEvent(QEvent *p_event) Q_DECL_OVERRIDE;
+
     private slots:
         void closeOnQuit();
 
@@ -105,13 +109,7 @@ namespace vnotex
 
         void setupShortcuts();
 
-        // Init system tray and correspondign context menu.
-        void initSystemTrayIcon();
-
-        // Tray icon.
-        QSystemTrayIcon *m_trayIcon;
-
-        bool m_requestQuit = false;
+        void setupSystemTray();
 
         ToolBarHelper m_toolBarHelper;
 
@@ -130,7 +128,14 @@ namespace vnotex
         QVector<QDockWidget *> m_docks;
 
         bool m_layoutReset = false;
-        
+
+        // -1: do not request to quit;
+        // 0 and above: exit code.
+        int m_requestQuit = -1;
+
+        Qt::WindowStates m_windowOldState = Qt::WindowMinimized;
+
+        QSystemTrayIcon *m_trayIcon = nullptr;
     };
 } // ns vnotex
 
diff --git a/src/widgets/systemtrayhelper.cpp b/src/widgets/systemtrayhelper.cpp
new file mode 100644
index 00000000..1b97bc06
--- /dev/null
+++ b/src/widgets/systemtrayhelper.cpp
@@ -0,0 +1,50 @@
+#include "systemtrayhelper.h"
+
+#include <QMenu>
+#include <QIcon>
+#include <QSystemTrayIcon>
+#include <QApplication>
+
+#include "mainwindow.h"
+#include "widgetsfactory.h"
+
+using namespace vnotex;
+
+QSystemTrayIcon *SystemTrayHelper::setupSystemTray(MainWindow *p_win)
+{
+#if defined(Q_OS_MACOS)
+    QIcon icon(":/vnotex/data/core/logo/vnote_mono.png");
+    icon.setIsMask(true);
+#else
+    QIcon icon(":/vnotex/data/core/logo/256x256/vnote.png");
+#endif
+
+    auto trayIcon = new QSystemTrayIcon(icon, p_win);
+    trayIcon->setToolTip(qApp->applicationName());
+
+    MainWindow::connect(trayIcon, &QSystemTrayIcon::activated,
+                        p_win, [p_win](QSystemTrayIcon::ActivationReason p_reason) {
+#if !defined(Q_OS_MACOS)
+                            if (p_reason == QSystemTrayIcon::Trigger) {
+                                p_win->showMainWindow();
+                            }
+#endif
+                        });
+
+    auto menu = WidgetsFactory::createMenu(p_win);
+    trayIcon->setContextMenu(menu);
+
+    menu->addAction(MainWindow::tr("Show Main Window"),
+                    menu,
+                    [p_win]() {
+                        p_win->showMainWindow();
+                    });
+
+    menu->addAction(MainWindow::tr("Quit"),
+                    menu,
+                    [p_win]() {
+                        p_win->quitApp();
+                    });
+
+    return trayIcon;
+}
diff --git a/src/widgets/systemtrayhelper.h b/src/widgets/systemtrayhelper.h
new file mode 100644
index 00000000..b50666aa
--- /dev/null
+++ b/src/widgets/systemtrayhelper.h
@@ -0,0 +1,19 @@
+#ifndef SYSTEMTRAYHELPER_H
+#define SYSTEMTRAYHELPER_H
+
+class QSystemTrayIcon;
+
+namespace vnotex
+{
+    class MainWindow;
+
+    class SystemTrayHelper
+    {
+    public:
+        SystemTrayHelper() = delete;
+
+        static QSystemTrayIcon *setupSystemTray(MainWindow *p_win);
+    };
+}
+
+#endif // SYSTEMTRAYHELPER_H
diff --git a/src/widgets/toolbarhelper.cpp b/src/widgets/toolbarhelper.cpp
index 487492b2..6731dadc 100644
--- a/src/widgets/toolbarhelper.cpp
+++ b/src/widgets/toolbarhelper.cpp
@@ -308,6 +308,11 @@ QToolBar *ToolBarHelper::setupSettingsToolBar(MainWindow *p_win, QToolBar *p_too
 
         menu->addSeparator();
 
+        menu->addAction(MainWindow::tr("Quit"),
+                        menu,
+                        [p_win]() {
+                            p_win->quitApp();
+                        });
         menu->addAction(MainWindow::tr("Restart"),
                         menu,
                         [p_win]() {
diff --git a/src/widgets/viewarea.h b/src/widgets/viewarea.h
index 404c49a7..b4864c33 100644
--- a/src/widgets/viewarea.h
+++ b/src/widgets/viewarea.h
@@ -13,7 +13,6 @@
 
 class QLayout;
 class QSplitter;
-class QTimer;
 
 namespace vnotex
 {
diff --git a/src/widgets/widgets.pri b/src/widgets/widgets.pri
index 2bab2a94..634fefc9 100644
--- a/src/widgets/widgets.pri
+++ b/src/widgets/widgets.pri
@@ -43,6 +43,7 @@ SOURCES += \
     $$PWD/outlineprovider.cpp \
     $$PWD/outlineviewer.cpp \
     $$PWD/propertydefs.cpp \
+    $$PWD/systemtrayhelper.cpp \
     $$PWD/textviewwindow.cpp \
     $$PWD/toolbarhelper.cpp \
     $$PWD/treeview.cpp \
@@ -122,6 +123,7 @@ HEADERS += \
     $$PWD/outlineprovider.h \
     $$PWD/outlineviewer.h \
     $$PWD/propertydefs.h \
+    $$PWD/systemtrayhelper.h \
     $$PWD/textviewwindow.h \
     $$PWD/textviewwindowhelper.h \
     $$PWD/toolbarhelper.h \