diff --git a/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_mesh_plugin.cpp b/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_mesh_plugin.cpp
index 8ca1eebf052..64e894bec8c 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_mesh_plugin.cpp
+++ b/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_mesh_plugin.cpp
@@ -72,7 +72,7 @@ public :
       timer.stop();
     });
     connect(&timer, SIGNAL (timeout()), this, SLOT (next_frame()));
-    frame = 0;
+    frame = -1;
   }
 
   bool applicable(QAction*) const override
@@ -168,15 +168,17 @@ public Q_SLOTS:
     }
     position = frame_pos[++frame];
     dock_widget->frameSlider->setValue(frame);
+    dock_widget->frameLabel->setText(QString("%1/%2").arg(frame).arg(frame_pos.size()-1));
     read_frame();
   }
 
   void prev_frame()
   {
-    if(frame == 0)
+    if(frame <= 0)
       return;
     position = frame_pos[--frame];
     dock_widget->frameSlider->setValue(frame);
+    dock_widget->frameLabel->setText(QString("%1/%2").arg(frame).arg(frame_pos.size()-1));
     read_frame();
   }
 
@@ -187,8 +189,10 @@ public Q_SLOTS:
 
   void reset_animation()
   {
-    frame=0;
+    timer.stop();
+    frame=-1;
     dock_widget->frameSlider->setValue(frame);
+    dock_widget->frameLabel->setText(QString("%1/%2").arg(frame).arg(frame_pos.size()-1));
     for(std::size_t id = 0; id<initial_points.size();++id)
     {
       sm_item->face_graph()->points()[SMesh::Vertex_index(id)]=initial_points[id];
@@ -210,7 +214,7 @@ public Q_SLOTS:
       position=0;
       frame_pos.clear();
       filepath="";
-      frame = 0;
+      frame = -1;
       dock_widget->resetButton->setEnabled(false);
       dock_widget->startButton->setEnabled(false);
       dock_widget->prevButton->setEnabled(false);
@@ -267,6 +271,7 @@ public Q_SLOTS:
     }
     is.close();
     dock_widget->frameSlider->setMaximum(frame_pos.size()-1);
+    dock_widget->frameLabel->setText(QString("%1/%2").arg(frame).arg(frame_pos.size()-1));
     QApplication::restoreOverrideCursor();
   }
 
@@ -285,7 +290,7 @@ private:
   Scene_surface_mesh_item* sm_item;
   std::vector<std::streampos> frame_pos;
   QTimer timer;
-  std::size_t frame;
+  int frame;
   std::vector<SMesh::Point> initial_points;
 }; //end of plugin class
 #include "Animate_mesh_plugin.moc"
diff --git a/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_widget.ui b/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_widget.ui
index f9c60660549..82130fc7e43 100644
--- a/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_widget.ui
+++ b/Polyhedron/demo/Polyhedron/Plugins/Operations_on_polyhedra/Animate_widget.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>444</width>
-    <height>120</height>
+    <height>150</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -43,14 +43,55 @@
      </layout>
     </item>
     <item>
-     <widget class="QSlider" name="frameSlider">
-      <property name="orientation">
-       <enum>Qt::Horizontal</enum>
-      </property>
-      <property name="tickPosition">
-       <enum>QSlider::TicksAbove</enum>
-      </property>
-     </widget>
+     <layout class="QHBoxLayout" name="horizontalLayout_3">
+      <item>
+       <widget class="QSlider" name="frameSlider">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="tickPosition">
+         <enum>QSlider::TicksAbove</enum>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout_4">
+      <item>
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+      <item>
+       <widget class="QLabel" name="frameLabel">
+        <property name="text">
+         <string>0/N</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer_2">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
     </item>
     <item>
      <layout class="QHBoxLayout" name="horizontalLayout">