diff --git a/src/gui/formmain.cpp b/src/gui/formmain.cpp
index 9288f72de..b2ce54574 100644
--- a/src/gui/formmain.cpp
+++ b/src/gui/formmain.cpp
@@ -78,6 +78,15 @@ void FormMain::quit() {
   qApp->quit();
 }
 
+void FormMain::switchFullscreenMode(bool turn_fullscreen_on) {
+  if (turn_fullscreen_on) {
+    showFullScreen();
+  } else {
+
+    showNormal();
+  }
+}
+
 void FormMain::switchVisibility() {
   if (isVisible()) {
     hide();
@@ -122,6 +131,7 @@ void FormMain::setupIcons() {
   m_ui->m_actionAboutGuard->setIcon(ThemeFactory::fromTheme("help-about"));
   m_ui->m_actionImport->setIcon(ThemeFactory::fromTheme("document-import"));
   m_ui->m_actionExport->setIcon(ThemeFactory::fromTheme("document-export"));
+  m_ui->m_actionFullscreen->setIcon(ThemeFactory::fromTheme("view-fullscreen"));
 
   // Setup icons for underlying components: opened web browsers...
   foreach (WebBrowser *browser, WebBrowser::runningWebBrowsers()) {
@@ -133,6 +143,9 @@ void FormMain::createConnections() {
   // Menu "File" connections.
   connect(m_ui->m_actionQuit, &QAction::triggered, this, &FormMain::quit);
 
+  // Menu "View" connections.
+  connect(m_ui->m_actionFullscreen, &QAction::triggered, this, &FormMain::switchFullscreenMode);
+
   // Menu "Tools" connections.
   connect(m_ui->m_actionSettings, &QAction::triggered, this, &FormMain::showSettings);
 
diff --git a/src/gui/formmain.h b/src/gui/formmain.h
index cd648e52b..88a991628 100644
--- a/src/gui/formmain.h
+++ b/src/gui/formmain.h
@@ -48,10 +48,17 @@ class FormMain : public QMainWindow {
 
     // Displays window on top or switches its visibility.
     void display();
+
+    // Switches visibility of main window.
     void switchVisibility();
 
+    // Turns on/off fullscreen mode
+    void switchFullscreenMode(bool turn_fullscreen_on);
+
   protected slots:
     void cleanupResources();
+
+    // Displays various dialogs.
     void showSettings();
     void showAbout();
     
diff --git a/src/gui/formmain.ui b/src/gui/formmain.ui
index 11cfabe98..1a9befae8 100644
--- a/src/gui/formmain.ui
+++ b/src/gui/formmain.ui
@@ -75,7 +75,7 @@
      <x>0</x>
      <y>0</y>
      <width>800</width>
-     <height>21</height>
+     <height>19</height>
     </rect>
    </property>
    <widget class="QMenu" name="m_menuFile">
@@ -97,6 +97,7 @@
     <property name="title">
      <string>&amp;View</string>
     </property>
+    <addaction name="m_actionFullscreen"/>
    </widget>
    <widget class="QMenu" name="m_menuTools">
     <property name="title">
@@ -147,6 +148,17 @@
     <string>&amp;About RSS Guard</string>
    </property>
   </action>
+  <action name="m_actionFullscreen">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>&amp;Fullscreen mode</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Shift+F</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>