diff --git a/panda/src/egldisplay/eglGraphicsWindow.cxx b/panda/src/egldisplay/eglGraphicsWindow.cxx
index 9e82bac2e7..7ef3efb80e 100644
--- a/panda/src/egldisplay/eglGraphicsWindow.cxx
+++ b/panda/src/egldisplay/eglGraphicsWindow.cxx
@@ -1215,16 +1215,19 @@ handle_keypress(XKeyEvent &event) {
 
   // Now get the raw unshifted button.
   ButtonHandle button = get_button(event, false);
-  if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
-    _input_devices[0].button_down(KeyboardButton::control());
-  }
-  if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
-    _input_devices[0].button_down(KeyboardButton::shift());
-  }
-  if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
-    _input_devices[0].button_down(KeyboardButton::alt());
-  }
   if (button != ButtonHandle::none()) {
+    if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
+      _input_devices[0].button_down(KeyboardButton::control());
+    }
+    if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
+      _input_devices[0].button_down(KeyboardButton::shift());
+    }
+    if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
+      _input_devices[0].button_down(KeyboardButton::alt());
+    }
+    if (button == KeyboardButton::lmeta() || button == KeyboardButton::rmeta()) {
+      _input_devices[0].button_down(KeyboardButton::meta());
+    }
     _input_devices[0].button_down(button);
   }
 }
@@ -1241,16 +1244,19 @@ handle_keyrelease(XKeyEvent &event) {
 
   // Now get the raw unshifted button.
   ButtonHandle button = get_button(event, false);
-  if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
-    _input_devices[0].button_up(KeyboardButton::control());
-  }
-  if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
-    _input_devices[0].button_up(KeyboardButton::shift());
-  }
-  if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
-    _input_devices[0].button_up(KeyboardButton::alt());
-  }
   if (button != ButtonHandle::none()) {
+    if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
+      _input_devices[0].button_up(KeyboardButton::control());
+    }
+    if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
+      _input_devices[0].button_up(KeyboardButton::shift());
+    }
+    if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
+      _input_devices[0].button_up(KeyboardButton::alt());
+    }
+    if (button == KeyboardButton::lmeta() || button == KeyboardButton::rmeta()) {
+      _input_devices[0].button_up(KeyboardButton::meta());
+    }
     _input_devices[0].button_up(button);
   }
 }
@@ -1636,6 +1642,8 @@ map_button(KeySym key) {
     return KeyboardButton::print_screen();
   case XK_Pause:
     return KeyboardButton::pause();
+  case XK_Menu:
+    return KeyboardButton::menu();
   case XK_Shift_L:
     return KeyboardButton::lshift();
   case XK_Shift_R:
@@ -1649,8 +1657,9 @@ map_button(KeySym key) {
   case XK_Alt_R:
     return KeyboardButton::ralt();
   case XK_Meta_L:
+    return KeyboardButton::lmeta();
   case XK_Meta_R:
-    return KeyboardButton::meta();
+    return KeyboardButton::rmeta();
   case XK_Caps_Lock:
     return KeyboardButton::caps_lock();
   case XK_Shift_Lock:
diff --git a/panda/src/putil/keyboardButton.cxx b/panda/src/putil/keyboardButton.cxx
index 6f4971c1fb..6b728096da 100644
--- a/panda/src/putil/keyboardButton.cxx
+++ b/panda/src/putil/keyboardButton.cxx
@@ -49,7 +49,6 @@ ascii_key(const string &ascii_equivalent) {
 #define DEFINE_KEYBD_BUTTON_HANDLE(KeyName)     \
                   static ButtonHandle _##KeyName; \
                   ButtonHandle KeyboardButton::KeyName() { return _##KeyName; }
-                  
 
 DEFINE_KEYBD_BUTTON_HANDLE(space)
 DEFINE_KEYBD_BUTTON_HANDLE(backspace)
@@ -90,6 +89,7 @@ DEFINE_KEYBD_BUTTON_HANDLE(scroll_lock)
 DEFINE_KEYBD_BUTTON_HANDLE(num_lock)
 DEFINE_KEYBD_BUTTON_HANDLE(print_screen)
 DEFINE_KEYBD_BUTTON_HANDLE(pause)
+DEFINE_KEYBD_BUTTON_HANDLE(menu)
 DEFINE_KEYBD_BUTTON_HANDLE(shift)
 DEFINE_KEYBD_BUTTON_HANDLE(control)
 DEFINE_KEYBD_BUTTON_HANDLE(alt)
@@ -99,6 +99,8 @@ DEFINE_KEYBD_BUTTON_HANDLE(lcontrol)
 DEFINE_KEYBD_BUTTON_HANDLE(rcontrol)
 DEFINE_KEYBD_BUTTON_HANDLE(lalt)
 DEFINE_KEYBD_BUTTON_HANDLE(ralt)
+DEFINE_KEYBD_BUTTON_HANDLE(lmeta)
+DEFINE_KEYBD_BUTTON_HANDLE(rmeta)
 
 
 ////////////////////////////////////////////////////////////////////
@@ -143,7 +145,7 @@ init_keyboard_buttons() {
   ButtonRegistry::ptr()->register_button(_left, "arrow_left");
   ButtonRegistry::ptr()->register_button(_right, "arrow_right");
   ButtonRegistry::ptr()->register_button(_up, "arrow_up");  // cannot name this 'up' since it conflicts with key-release name 'up'
-  ButtonRegistry::ptr()->register_button(_down, "arrow_down");  
+  ButtonRegistry::ptr()->register_button(_down, "arrow_down");
   ButtonRegistry::ptr()->register_button(_page_up, "page_up");
   ButtonRegistry::ptr()->register_button(_page_down, "page_down");
   ButtonRegistry::ptr()->register_button(_home, "home");
@@ -161,6 +163,7 @@ init_keyboard_buttons() {
   ButtonRegistry::ptr()->register_button(_scroll_lock, "scroll_lock");
   ButtonRegistry::ptr()->register_button(_print_screen, "print_screen");
   ButtonRegistry::ptr()->register_button(_pause, "pause");
+  ButtonRegistry::ptr()->register_button(_menu, "menu");
 
   ButtonRegistry::ptr()->register_button(_lshift, "lshift", _shift);
   ButtonRegistry::ptr()->register_button(_rshift, "rshift", _shift);
@@ -168,12 +171,14 @@ init_keyboard_buttons() {
   ButtonRegistry::ptr()->register_button(_rcontrol, "rcontrol", _control);
   ButtonRegistry::ptr()->register_button(_lalt, "lalt", _alt);
   ButtonRegistry::ptr()->register_button(_ralt, "ralt", _alt);
+  ButtonRegistry::ptr()->register_button(_lmeta, "lmeta", _meta);
+  ButtonRegistry::ptr()->register_button(_rmeta, "rmeta", _meta);
 
   // Also register all of the visible ASCII characters.
   for (int i = 32; i < 127; i++) {
     if (isgraph(i)) {
       ButtonHandle key;
-      ButtonRegistry::ptr()->register_button(key, string(1, (char)i), 
+      ButtonRegistry::ptr()->register_button(key, string(1, (char)i),
                                              ButtonHandle::none(), i);
     }
   }
diff --git a/panda/src/putil/keyboardButton.h b/panda/src/putil/keyboardButton.h
index 94be8d3eed..cd74d7d023 100644
--- a/panda/src/putil/keyboardButton.h
+++ b/panda/src/putil/keyboardButton.h
@@ -66,6 +66,7 @@ PUBLISHED:
   static ButtonHandle insert();
   static ButtonHandle del();  // delete is a C++ keyword.
   static ButtonHandle help();
+  static ButtonHandle menu();
 
   static ButtonHandle shift();
   static ButtonHandle control();
@@ -84,6 +85,8 @@ PUBLISHED:
   static ButtonHandle rcontrol();
   static ButtonHandle lalt();
   static ButtonHandle ralt();
+  static ButtonHandle lmeta();
+  static ButtonHandle rmeta();
 
 public:
   static void init_keyboard_buttons();
diff --git a/panda/src/windisplay/winGraphicsWindow.cxx b/panda/src/windisplay/winGraphicsWindow.cxx
index 1389b1a637..25090a7069 100644
--- a/panda/src/windisplay/winGraphicsWindow.cxx
+++ b/panda/src/windisplay/winGraphicsWindow.cxx
@@ -2605,9 +2605,9 @@ lookup_raw_key(LPARAM lparam) const {
   switch (vsc) {
   case 87: return KeyboardButton::f11();
   case 88: return KeyboardButton::f12();
-  //case 91: return KeyboardButton::lmeta();
-  //case 92: return KeyboardButton::rmeta();
-  //case 93: return KeyboardButton::menu();
+  case 91: return KeyboardButton::lmeta();
+  case 92: return KeyboardButton::rmeta();
+  case 93: return KeyboardButton::menu();
   default: return ButtonHandle::none();
   }
 }
diff --git a/panda/src/x11display/x11GraphicsWindow.cxx b/panda/src/x11display/x11GraphicsWindow.cxx
index 41d6a145be..ec7c79a48b 100644
--- a/panda/src/x11display/x11GraphicsWindow.cxx
+++ b/panda/src/x11display/x11GraphicsWindow.cxx
@@ -1392,16 +1392,19 @@ handle_keypress(XKeyEvent &event) {
 
   // Now get the raw unshifted button.
   ButtonHandle button = get_button(event, false);
-  if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
-    _input_devices[0].button_down(KeyboardButton::control());
-  }
-  if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
-    _input_devices[0].button_down(KeyboardButton::shift());
-  }
-  if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
-    _input_devices[0].button_down(KeyboardButton::alt());
-  }
   if (button != ButtonHandle::none()) {
+    if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
+      _input_devices[0].button_down(KeyboardButton::control());
+    }
+    if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
+      _input_devices[0].button_down(KeyboardButton::shift());
+    }
+    if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
+      _input_devices[0].button_down(KeyboardButton::alt());
+    }
+    if (button == KeyboardButton::lmeta() || button == KeyboardButton::rmeta()) {
+      _input_devices[0].button_down(KeyboardButton::meta());
+    }
     _input_devices[0].button_down(button);
   }
 
@@ -1425,16 +1428,19 @@ handle_keyrelease(XKeyEvent &event) {
 
   // Now get the raw unshifted button.
   ButtonHandle button = get_button(event, false);
-  if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
-    _input_devices[0].button_up(KeyboardButton::control());
-  }
-  if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
-    _input_devices[0].button_up(KeyboardButton::shift());
-  }
-  if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
-    _input_devices[0].button_up(KeyboardButton::alt());
-  }
   if (button != ButtonHandle::none()) {
+    if (button == KeyboardButton::lcontrol() || button == KeyboardButton::rcontrol()) {
+      _input_devices[0].button_up(KeyboardButton::control());
+    }
+    if (button == KeyboardButton::lshift() || button == KeyboardButton::rshift()) {
+      _input_devices[0].button_up(KeyboardButton::shift());
+    }
+    if (button == KeyboardButton::lalt() || button == KeyboardButton::ralt()) {
+      _input_devices[0].button_up(KeyboardButton::alt());
+    }
+    if (button == KeyboardButton::lmeta() || button == KeyboardButton::rmeta()) {
+      _input_devices[0].button_up(KeyboardButton::meta());
+    }
     _input_devices[0].button_up(button);
   }
 
@@ -1825,6 +1831,8 @@ map_button(KeySym key) {
     return KeyboardButton::print_screen();
   case XK_Pause:
     return KeyboardButton::pause();
+  case XK_Menu:
+    return KeyboardButton::menu();
   case XK_Shift_L:
     return KeyboardButton::lshift();
   case XK_Shift_R:
@@ -1838,8 +1846,9 @@ map_button(KeySym key) {
   case XK_Alt_R:
     return KeyboardButton::ralt();
   case XK_Meta_L:
+    return KeyboardButton::lmeta();
   case XK_Meta_R:
-    return KeyboardButton::meta();
+    return KeyboardButton::rmeta();
   case XK_Caps_Lock:
     return KeyboardButton::caps_lock();
   case XK_Shift_Lock:
@@ -1963,9 +1972,9 @@ map_raw_button(KeyCode key) {
 
   case 127: return KeyboardButton::pause();
 
-  //case 133: return KeyboardButton::lmeta();
-  //case 134: return KeyboardButton::rmeta();
-  //case 135: return KeyboardButton::menu();
+  case 133: return KeyboardButton::lmeta();
+  case 134: return KeyboardButton::rmeta();
+  case 135: return KeyboardButton::menu();
   }
   return ButtonHandle::none();
 }