diff --git a/docs/shortcuts.rst b/docs/shortcuts.rst
index 43278247..c81ebff5 100644
--- a/docs/shortcuts.rst
+++ b/docs/shortcuts.rst
@@ -72,6 +72,10 @@ Keyboard
 +----------------------+--------------------------------------------------------------------------+
 | F                    | Bring the part widget of current hovered part to visible area            |
 +----------------------+--------------------------------------------------------------------------+
+| W                    | Toggle render wireframe                                                  |
++----------------------+--------------------------------------------------------------------------+
+| O                    | Toggle render flat shading                                               |
++----------------------+--------------------------------------------------------------------------+
 
 Mouse
 ======
diff --git a/src/documentwindow.cpp b/src/documentwindow.cpp
index 49991f1d..f363fe78 100644
--- a/src/documentwindow.cpp
+++ b/src/documentwindow.cpp
@@ -856,6 +856,10 @@ DocumentWindow::DocumentWindow() :
     connect(graphicsWidget, &SkeletonGraphicsWidget::shortcutToggleWireframe, [=]() {
         m_modelRenderWidget->toggleWireframe();
     });
+    
+    connect(graphicsWidget, &SkeletonGraphicsWidget::shortcutToggleFlatShading, [=]() {
+        Preferences::instance().setFlatShading(!Preferences::instance().flatShading());
+    });
 
     connect(graphicsWidget, &SkeletonGraphicsWidget::zoomRenderedModelBy, m_modelRenderWidget, &ModelWidget::zoom);
 
diff --git a/src/shortcuts.cpp b/src/shortcuts.cpp
index 31f1d90a..2c38d518 100644
--- a/src/shortcuts.cpp
+++ b/src/shortcuts.cpp
@@ -48,4 +48,5 @@ void initShortCuts(QWidget *widget, SkeletonGraphicsWidget *graphicsWidget)
     defineKey(Qt::Key_W, &SkeletonGraphicsWidget::shortcutToggleWireframe);
     defineKey(Qt::Key_F, &SkeletonGraphicsWidget::shortcutCheckPartComponent);
     defineKey(Qt::Key_C, &SkeletonGraphicsWidget::shortcutChamferedOrNotSelectedPart);
+    defineKey(Qt::Key_O, &SkeletonGraphicsWidget::shortcutToggleFlatShading);
 }
diff --git a/src/skeletongraphicswidget.h b/src/skeletongraphicswidget.h
index 494a6c29..4fa3921b 100644
--- a/src/skeletongraphicswidget.h
+++ b/src/skeletongraphicswidget.h
@@ -417,6 +417,7 @@ signals:
     void shortcutToggleWireframe();
     void partComponentChecked(QUuid partId);
     void showOrHideAllComponents();
+    void shortcutToggleFlatShading();
 public:
     SkeletonGraphicsWidget(const SkeletonDocument *document);
     std::map<QUuid, std::pair<SkeletonGraphicsNodeItem *, SkeletonGraphicsNodeItem *>> nodeItemMap;