diff --git a/map65/mainwindow.cpp b/map65/mainwindow.cpp
index 6fd297185..08a4aa058 100644
--- a/map65/mainwindow.cpp
+++ b/map65/mainwindow.cpp
@@ -994,6 +994,11 @@ void MainWindow::on_actionQSG_MAP65_v3_triggered()
   QDesktopServices::openUrl (QUrl {"https://physics.princeton.edu/pulsar/k1jt/MAP65_3.0_Quick_Start.pdf"});
 }
 
+void MainWindow::on_actionQ65_Sensitivity_in_MAP65_3_0_triggered()
+{
+  QDesktopServices::openUrl (QUrl {"https://physics.princeton.edu/pulsar/k1jt/Q65_Sensitivity_in_MAP65.pdf"});
+}
+
 void MainWindow::on_actionAstro_Data_triggered()             //Display Astro
 {
   if (m_astro_window ) m_astro_window->show();
diff --git a/map65/mainwindow.h b/map65/mainwindow.h
index eba776438..63040e589 100644
--- a/map65/mainwindow.h
+++ b/map65/mainwindow.h
@@ -79,6 +79,7 @@ private slots:
   void on_actionOnline_Users_Guide_triggered();
   void on_actionQSG_Q65_triggered();
   void on_actionQSG_MAP65_v3_triggered();
+  void on_actionQ65_Sensitivity_in_MAP65_3_0_triggered();
   void on_actionWide_Waterfall_triggered();
   void on_actionBand_Map_triggered();
   void on_actionMessages_triggered();
diff --git a/map65/mainwindow.ui b/map65/mainwindow.ui
index b67671375..391f1cc69 100644
--- a/map65/mainwindow.ui
+++ b/map65/mainwindow.ui
@@ -1218,6 +1218,7 @@ p, li { white-space: pre-wrap; }
     <addaction name="actionOnline_Users_Guide"/>
     <addaction name="actionQSG_Q65"/>
     <addaction name="actionQSG_MAP65_v3"/>
+    <addaction name="actionQ65_Sensitivity_in_MAP65_3_0"/>
     <addaction name="actionKeyboard_shortcuts"/>
     <addaction name="actionSpecial_mouse_commands"/>
     <addaction name="actionAvailable_suffixes_and_add_on_prefixes"/>
@@ -1674,6 +1675,11 @@ p, li { white-space: pre-wrap; }
     <string>Quick-Start Guide to MAP65 3.0 and WSJT-X 2.5.0</string>
    </property>
   </action>
+  <action name="actionQ65_Sensitivity_in_MAP65_3_0">
+   <property name="text">
+    <string>Q65 Sensitivity in MAP65 3.0</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
@@ -1692,8 +1698,8 @@ p, li { white-space: pre-wrap; }
    <slot>update()</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>264</x>
-     <y>275</y>
+     <x>269</x>
+     <y>255</y>
     </hint>
     <hint type="destinationlabel">
      <x>126</x>