diff --git a/pandatool/src/win-stats/winStatsGraph.cxx b/pandatool/src/win-stats/winStatsGraph.cxx
index dc991eafbd..c0288e9040 100644
--- a/pandatool/src/win-stats/winStatsGraph.cxx
+++ b/pandatool/src/win-stats/winStatsGraph.cxx
@@ -58,6 +58,8 @@ WinStatsGraph(WinStatsMonitor *monitor, int thread_index) :
   _drag_mode = DM_none;
   _potential_drag_mode = DM_none;
   _drag_scale_start = 0.0f;
+
+  _pause = false;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -163,6 +165,18 @@ void WinStatsGraph::
 set_scroll_speed(float scroll_speed) {
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: WinStatsGraph::set_pause
+//       Access: Public
+//  Description: Changes the pause flag for the graph.  When this flag
+//               is true, the graph does not update in response to new
+//               data.
+////////////////////////////////////////////////////////////////////
+void WinStatsGraph::
+set_pause(bool pause) {
+  _pause = pause;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: WinStatsGraph::user_guide_bars_changed
 //       Access: Public
diff --git a/pandatool/src/win-stats/winStatsGraph.h b/pandatool/src/win-stats/winStatsGraph.h
index 67c02b7fa0..7695fe490f 100644
--- a/pandatool/src/win-stats/winStatsGraph.h
+++ b/pandatool/src/win-stats/winStatsGraph.h
@@ -58,6 +58,8 @@ public:
 
   virtual void set_time_units(int unit_mask);
   virtual void set_scroll_speed(float scroll_speed);
+  void set_pause(bool pause);
+
   void user_guide_bars_changed();
   virtual void clicked_label(int collector_index);
 
@@ -112,6 +114,8 @@ protected:
   float _drag_scale_start;
   int _drag_guide_bar;
 
+  bool _pause;
+
 private:
   void setup_bitmap(int xsize, int ysize);
   void release_bitmap();
diff --git a/pandatool/src/win-stats/winStatsMenuId.h b/pandatool/src/win-stats/winStatsMenuId.h
index 065f7681cd..23351f0684 100755
--- a/pandatool/src/win-stats/winStatsMenuId.h
+++ b/pandatool/src/win-stats/winStatsMenuId.h
@@ -36,6 +36,7 @@ enum WinStatsMenuId {
   MI_speed_3,
   MI_speed_6,
   MI_speed_12,
+  MI_pause,
 
   // This one is last and represents the beginning of the range for
   // the various "new chart" menu options.
diff --git a/pandatool/src/win-stats/winStatsMonitor.cxx b/pandatool/src/win-stats/winStatsMonitor.cxx
index 9d207fae27..03a55f14b3 100644
--- a/pandatool/src/win-stats/winStatsMonitor.cxx
+++ b/pandatool/src/win-stats/winStatsMonitor.cxx
@@ -40,9 +40,10 @@ WinStatsMonitor(WinStatsServer *server) : PStatMonitor(server) {
   _menu_bar = 0;
   _options_menu = 0;
 
-  // This is filled in later when the menu is created.
+  // These will be filled in later when the menu is created.
   _time_units = 0;
   _scroll_speed = 0.0;
+  _pause = false;
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -295,6 +296,7 @@ open_strip_chart(int thread_index, int collector_index) {
 
   graph->set_time_units(_time_units);
   graph->set_scroll_speed(_scroll_speed);
+  graph->set_pause(_pause);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -309,6 +311,7 @@ open_piano_roll(int thread_index) {
 
   graph->set_time_units(_time_units);
   graph->set_scroll_speed(_scroll_speed);
+  graph->set_pause(_pause);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -430,6 +433,33 @@ set_scroll_speed(float scroll_speed) {
   SetMenuItemInfo(_speed_menu, MI_speed_12, FALSE, &mii);
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: WinStatsMonitor::set_pause
+//       Access: Public
+//  Description: Called when the user selects a pause on or pause off
+//               option from the menu.
+////////////////////////////////////////////////////////////////////
+void WinStatsMonitor::
+set_pause(bool pause) {
+  _pause = pause;
+
+  // First, change all of the open graphs appropriately.
+  Graphs::iterator gi;
+  for (gi = _graphs.begin(); gi != _graphs.end(); ++gi) {
+    WinStatsGraph *graph = (*gi);
+    graph->set_pause(_pause);
+  }
+
+  // Now change the checkmark on the pulldown menu.
+  MENUITEMINFO mii;
+  memset(&mii, 0, sizeof(mii));
+  mii.cbSize = sizeof(mii);
+  mii.fMask = MIIM_STATE;
+
+  mii.fState = _pause ? MFS_CHECKED : MFS_UNCHECKED;
+  SetMenuItemInfo(_speed_menu, MI_pause, FALSE, &mii);
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: WinStatsMonitor::add_graph
 //       Access: Private
@@ -587,7 +617,18 @@ setup_speed_menu() {
   mii.dwTypeData = "12";
   InsertMenuItem(_speed_menu, GetMenuItemCount(_speed_menu), TRUE, &mii);
 
+  mii.fMask = MIIM_FTYPE; 
+  mii.fType = MFT_SEPARATOR; 
+  InsertMenuItem(_speed_menu, GetMenuItemCount(_speed_menu), TRUE, &mii);
+
+  mii.fMask = MIIM_STRING | MIIM_FTYPE | MIIM_ID | MIIM_CHECKMARKS | MIIM_STATE;
+  mii.fType = MFT_STRING; 
+  mii.wID = MI_pause;
+  mii.dwTypeData = "pause";
+  InsertMenuItem(_speed_menu, GetMenuItemCount(_speed_menu), TRUE, &mii);
+
   set_scroll_speed(3);
+  set_pause(false);
 }
 
 ////////////////////////////////////////////////////////////////////
@@ -727,6 +768,10 @@ handle_menu_command(int menu_id) {
     set_scroll_speed(12);
     break;
 
+  case MI_pause:
+    set_pause(!_pause);
+    break;
+
   default:
     if (menu_id >= MI_new_chart) {
       const MenuDef &menu_def = lookup_menu(menu_id);
diff --git a/pandatool/src/win-stats/winStatsMonitor.h b/pandatool/src/win-stats/winStatsMonitor.h
index 7107423c8d..aba1c82357 100644
--- a/pandatool/src/win-stats/winStatsMonitor.h
+++ b/pandatool/src/win-stats/winStatsMonitor.h
@@ -76,6 +76,7 @@ public:
 
   void set_time_units(int unit_mask);
   void set_scroll_speed(float scroll_speed);
+  void set_pause(bool pause);
   
 private:
   void add_graph(WinStatsGraph *graph);
@@ -109,6 +110,7 @@ private:
   string _window_title;
   int _time_units;
   float _scroll_speed;
+  bool _pause;
 
   static bool _window_class_registered;
   static const char * const _window_class_name;
diff --git a/pandatool/src/win-stats/winStatsPianoRoll.cxx b/pandatool/src/win-stats/winStatsPianoRoll.cxx
index 74dad4b2d7..c8be9fe9ec 100755
--- a/pandatool/src/win-stats/winStatsPianoRoll.cxx
+++ b/pandatool/src/win-stats/winStatsPianoRoll.cxx
@@ -70,7 +70,9 @@ WinStatsPianoRoll::
 ////////////////////////////////////////////////////////////////////
 void WinStatsPianoRoll::
 new_data(int thread_index, int frame_number) {
-  update();
+  if (!_pause) {
+    update();
+  }
 }
 
 ////////////////////////////////////////////////////////////////////
diff --git a/pandatool/src/win-stats/winStatsStripChart.cxx b/pandatool/src/win-stats/winStatsStripChart.cxx
index 3f1104b0ca..4b6d969a29 100644
--- a/pandatool/src/win-stats/winStatsStripChart.cxx
+++ b/pandatool/src/win-stats/winStatsStripChart.cxx
@@ -91,7 +91,9 @@ new_collector(int collector_index) {
 ////////////////////////////////////////////////////////////////////
 void WinStatsStripChart::
 new_data(int thread_index, int frame_number) {
-  update();
+  if (!_pause) {
+    update();
+  }
 }
 
 ////////////////////////////////////////////////////////////////////