diff --git a/toonz/sources/toonz/frameheadgadget.cpp b/toonz/sources/toonz/frameheadgadget.cpp
index 75b5acf..29e3876 100644
--- a/toonz/sources/toonz/frameheadgadget.cpp
+++ b/toonz/sources/toonz/frameheadgadget.cpp
@@ -37,6 +37,12 @@ void enableOnionSkin(bool enable = true)
 	osmh->notifyOnionSkinMaskChanged();
 }
 
+void enableZeroThick(bool enable = true)
+{
+	Preferences::instance()->setShow0ThickLines(enable);
+	TApp::instance()->getCurrentScene()->notifySceneChanged();
+}
+
 bool isOnionSkinEnabled()
 {
 	TOnionSkinMaskHandle *osmh = TApp::instance()->getCurrentOnionSkin();
@@ -681,3 +687,20 @@ public:
 		enableOnionSkin(checked);
 	}
 } onionSkinToggle;
+
+
+class ZeroThickToggle : public MenuItemHandler
+{
+public:
+	ZeroThickToggle() : MenuItemHandler(MI_ZeroThick)
+	{
+	}
+	void execute()
+	{
+		QAction *action = CommandManager::instance()->getAction(MI_ZeroThick);
+		if (!action)
+			return;
+		bool checked = action->isChecked();
+		enableZeroThick(checked);
+	}
+} ZeroThickToggle;
diff --git a/toonz/sources/toonz/mainwindow.cpp b/toonz/sources/toonz/mainwindow.cpp
index f16816e..7627a62 100644
--- a/toonz/sources/toonz/mainwindow.cpp
+++ b/toonz/sources/toonz/mainwindow.cpp
@@ -1853,7 +1853,8 @@ void MainWindow::defineActions()
 
 	createRightClickMenuAction(MI_BlendColors, tr("&Blend colors"), "");
 
-	createToggle(MI_OnionSkin, tr("Onion Skin"), "", false, RightClickMenuCommandType);
+	createToggle(MI_OnionSkin, tr("Onion Skin"), "/", false, RightClickMenuCommandType);
+	createToggle(MI_ZeroThick, tr("Zero Thick Lines"), "Shift+/", false, RightClickMenuCommandType);
 
 	//createRightClickMenuAction(MI_LoadSubSceneFile,     tr("Load As Sub-xsheet"),   "");
 	//createRightClickMenuAction(MI_LoadResourceFile,     tr("Load"),								  "");
diff --git a/toonz/sources/toonz/menubarcommandids.h b/toonz/sources/toonz/menubarcommandids.h
index 10b3c26..287adcb 100644
--- a/toonz/sources/toonz/menubarcommandids.h
+++ b/toonz/sources/toonz/menubarcommandids.h
@@ -218,6 +218,7 @@
 #define MI_ResetRoomLayout "MI_ResetRoomLayout"
 
 #define MI_OnionSkin "MI_OnionSkin"
+#define MI_ZeroThick "MI_ZeroThick"
 
 //#define MI_LoadResourceFile       "MI_LoadResourceFile"
 #define MI_DuplicateFile "MI_DuplicateFile"