diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index cecb1417c..b16586e7f 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -96,7 +96,6 @@ TMainWindow::TMainWindow(QWidget *parent)
       labelGradationHeights(nullptr),
       labelGradationSizes(nullptr),
       labelPatternUnit(nullptr),
-      dockDiagramVisible(true),
       isInitialized(false),
       mIsReadOnly(false),
       recentFileActs(QVector<QAction *>(MaxRecentFiles)),
@@ -587,27 +586,6 @@ void TMainWindow::changeEvent(QEvent *event)
     QMainWindow::changeEvent(event);
 }
 
-//---------------------------------------------------------------------------------------------------------------------
-void TMainWindow::showEvent(QShowEvent *event)
-{
-    QMainWindow::showEvent( event );
-    if ( event->spontaneous() )
-    {
-        return;
-    }
-
-    if (isInitialized)
-    {
-        return;
-    }
-    // do your init stuff here
-
-    dockDiagramVisible = ui->dockWidgetDiagram->isVisible();
-    ui->dockWidgetDiagram->setVisible(false);
-
-    isInitialized = true;//first show windows are held
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 bool TMainWindow::eventFilter(QObject *object, QEvent *event)
 {
@@ -2024,7 +2002,6 @@ void TMainWindow::InitWindow()
     SCASSERT(m != nullptr)
     ui->labelToolTip->setVisible(false);
     ui->tabWidget->setVisible(true);
-    ui->actionMeasurementDiagram->setEnabled(true);
     ui->tabWidget->setCurrentIndex(0);
 
     ui->plainTextEditNotes->setEnabled(true);
diff --git a/src/app/tape/tmainwindow.h b/src/app/tape/tmainwindow.h
index f77a60b08..5503eafa7 100644
--- a/src/app/tape/tmainwindow.h
+++ b/src/app/tape/tmainwindow.h
@@ -40,7 +40,7 @@
 namespace Ui
 {
     class TMainWindow;
-}
+} // namespace Ui
 
 class QLabel;
 class QxtCsvModel;
@@ -69,7 +69,6 @@ public slots:
 protected:
     virtual void closeEvent(QCloseEvent *event) override;
     virtual void changeEvent(QEvent* event) override;
-    virtual void showEvent(QShowEvent *event) override;
     virtual bool eventFilter(QObject *object, QEvent *event) override;
     virtual void ExportToCSVData(const QString &fileName, bool withHeader, int mib,
                                  const QChar &separator) final;
@@ -149,8 +148,6 @@ private:
     QLabel *labelGradationHeights;
     QLabel *labelGradationSizes;
     QLabel *labelPatternUnit;
-    QAction *actionDockDiagram;
-    bool dockDiagramVisible;
     bool isInitialized;
     bool mIsReadOnly;
     enum { MaxRecentFiles = 5 };
diff --git a/src/app/tape/tmainwindow.ui b/src/app/tape/tmainwindow.ui
index 985fa3e95..62e6dab34 100644
--- a/src/app/tape/tmainwindow.ui
+++ b/src/app/tape/tmainwindow.ui
@@ -839,7 +839,7 @@
      <x>0</x>
      <y>0</y>
      <width>835</width>
-     <height>18</height>
+     <height>22</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -1213,7 +1213,7 @@
     <bool>true</bool>
    </property>
    <property name="enabled">
-    <bool>false</bool>
+    <bool>true</bool>
    </property>
    <property name="icon">
     <iconset resource="share/resources/tapeicon.qrc">
@@ -1222,6 +1222,9 @@
    <property name="text">
     <string>Measurement diagram</string>
    </property>
+   <property name="menuRole">
+    <enum>QAction::NoRole</enum>
+   </property>
   </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
@@ -1243,8 +1246,8 @@
    <slot>setVisible(bool)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>764</x>
-     <y>377</y>
+     <x>-1</x>
+     <y>-1</y>
     </hint>
     <hint type="destinationlabel">
      <x>764</x>
@@ -1252,5 +1255,21 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>dockWidgetDiagram</sender>
+   <signal>visibilityChanged(bool)</signal>
+   <receiver>actionMeasurementDiagram</receiver>
+   <slot>setChecked(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>734</x>
+     <y>384</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>-1</x>
+     <y>-1</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
 </ui>