diff --git a/.gitignore b/.gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /build*/
 *.kdev4
 CMakeLists.txt.user*
+.vscode
diff --git a/src/kmahjongg.h b/src/kmahjongg.h
--- a/src/kmahjongg.h
+++ b/src/kmahjongg.h
@@ -77,6 +77,7 @@
     void showHighscores();
     void slotBoardEditor();
     void noMovesAvailable();
+    void toggleFullscreen(bool fullscreen);
 
 private:
     enum class GameState { Gameplay,
@@ -112,6 +113,7 @@
     KGameClock * m_gameTimer;
 
     KToggleAction * m_pauseAction;
+    KToggleAction * m_fullscreenAction;
     KToggleAction * m_demoAction;
 
     static const QString gameMagic;
diff --git a/src/kmahjongg.cpp b/src/kmahjongg.cpp
--- a/src/kmahjongg.cpp
+++ b/src/kmahjongg.cpp
@@ -169,6 +169,10 @@
     actionCollection()->setDefaultShortcut(anglecw, Qt::Key_G);
     connect(anglecw, &QAction::triggered, m_gameView, &GameView::angleSwitchCW);
 
+    m_fullscreenAction = KStandardAction::fullScreen(
+        this, &KMahjongg::toggleFullscreen, this, actionCollection()
+    );
+
     m_demoAction = KStandardGameAction::demo(this, SLOT(demoMode()), actionCollection());
 
     KStandardGameAction::highscores(this, SLOT(showHighscores()), actionCollection());
@@ -188,6 +192,15 @@
     setupGUI(qApp->desktop()->availableGeometry().size() * 0.7);
 }
 
+void KMahjongg::toggleFullscreen(bool fullscreen)
+{
+    if (fullscreen) {
+        setWindowState(Qt::WindowState::WindowFullScreen);
+    } else {
+        setWindowState(Qt::WindowState::WindowNoState);
+    }
+}
+
 void KMahjongg::setupStatusBar()
 {
     m_gameTimerLabel = new QLabel(i18n("Time: 0:00:00"), statusBar());
diff --git a/src/kmahjonggui.rc b/src/kmahjonggui.rc
--- a/src/kmahjonggui.rc
+++ b/src/kmahjonggui.rc
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gui name="kmahjongg"
-     version="6"
+     version="7"
      xmlns="http://www.kde.org/standards/kxmlgui/1.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.kde.org/standards/kxmlgui/1.0
@@ -27,6 +27,7 @@
   <Action name="move_undo"/>
   <Action name="move_redo"/>
   <Action name="game_pause"/>
+  <Action name="fullscreen"/>
   <Action name="move_hint"/>
 </ToolBar>