diff --git a/part.h b/part.h
--- a/part.h
+++ b/part.h
@@ -237,6 +237,7 @@
         void enableTOC(bool enable);
         void slotRebuildBookmarkMenu();
         void enableLayers( bool enable );
+        void slotShowSignatures();
 
     public Q_SLOTS:
         bool saveFile() override;
@@ -311,6 +312,7 @@
         KMessageWidget * m_topMessage;
         KMessageWidget * m_formsMessage;
         KMessageWidget * m_infoMessage;
+        KMessageWidget * m_signatureMessage;
         QPointer<ThumbnailList> m_thumbnailList;
         QPointer<PageView> m_pageView;
         QPointer<TOC> m_toc;
@@ -376,6 +378,7 @@
         KToggleAction* m_showMenuBarAction;
         KToggleAction* m_showLeftPanel;
         KToggleAction* m_showBottomBar;
+        KToggleAction* m_showSignaturePanel;
         KToggleFullScreenAction* m_showFullScreenAction;
         QAction *m_aboutBackend;
         QAction *m_reload;
diff --git a/part.cpp b/part.cpp
--- a/part.cpp
+++ b/part.cpp
@@ -1,4 +1,4 @@
-/***************************************************************************
+/***************************************************************************
  *   Copyright (C) 2002 by Wilco Greven <greven@kde.org>                   *
  *   Copyright (C) 2002 by Chris Cheney <ccheney@cheney.cx>                *
  *   Copyright (C) 2002 by Malcolm Hunter <malcolm.hunter@gmx.co.uk>       *
@@ -511,6 +511,11 @@
     m_infoTimer = new QTimer();
     m_infoTimer->setSingleShot( true );
     connect( m_infoTimer, &QTimer::timeout, m_infoMessage, &KMessageWidget::animatedHide );
+    m_signatureMessage = new KMessageWidget( rightContainer );
+    m_signatureMessage->setVisible( false );
+    m_signatureMessage->setWordWrap( true );
+    m_signatureMessage->setMessageType( KMessageWidget::Information );
+    rightLayout->addWidget( m_signatureMessage );
     m_pageView = new PageView( rightContainer, m_document );
     QMetaObject::invokeMethod( m_pageView, "setFocus", Qt::QueuedConnection );      //usability setting
 //    m_splitter->setFocusProxy(m_pageView);
@@ -759,6 +764,7 @@
 
     m_showLeftPanel = nullptr;
     m_showBottomBar = nullptr;
+    m_showSignaturePanel = nullptr;
 
     m_showProperties = ac->addAction(QStringLiteral("properties"));
     m_showProperties->setText(i18n("&Properties"));
@@ -856,6 +862,13 @@
     m_showBottomBar->setChecked( Okular::Settings::showBottomBar() );
     slotShowBottomBar();
 
+    m_showSignaturePanel = ac->add<KToggleAction>(QStringLiteral("show_signatures"));
+    m_showSignaturePanel->setText(i18n("Show &Signatures"));
+    m_showSignaturePanel->setChecked( m_sidebar->isSidebarVisible() && m_sidebar->currentItem()->inherits("SignaturePanel") );
+    connect( m_showSignaturePanel, &QAction::triggered, this, &Part::slotShowSignatures );
+    connect( m_panel, &SignaturePanel::signaturePanelVisible, m_showSignaturePanel, &KToggleAction::setChecked );
+    slotShowSignatures();
+
     m_showEmbeddedFiles = ac->addAction(QStringLiteral("embedded_files"));
     m_showEmbeddedFiles->setText(i18n("&Embedded Files"));
     m_showEmbeddedFiles->setIcon( QIcon::fromTheme( QStringLiteral("mail-attachment") ) );
@@ -1563,17 +1576,24 @@
         m_formsMessage->setMessageType( KMessageWidget::Information );
         m_formsMessage->setVisible( true );
     }
-    else if ( ok && m_document->metaData( QStringLiteral("IsDigitallySigned") ).toBool() && m_embedMode == PrintPreviewMode )
-    {
-        m_formsMessage->setText( i18n( "All editing and interactive features for this document are disabled. Please save a copy and reopen to edit this document." ) );
-        m_formsMessage->setMessageType( KMessageWidget::Information );
-        m_formsMessage->setVisible( true );
-    }
     else
     {
         m_formsMessage->setVisible( false );
     }
 
+    if ( ok && m_document->metaData( QStringLiteral("IsDigitallySigned") ).toBool() )
+    {
+        if ( m_embedMode == PrintPreviewMode )
+        {
+            m_signatureMessage->setText( i18n( "All editing and interactive features for this document are disabled. Please save a copy and reopen to edit this document." ) );
+        }
+        else
+        {
+            m_signatureMessage->setText( i18n( "This document is digitally signed." ) );
+        }
+        m_signatureMessage->setVisible( true );
+    }
+
     if ( m_showPresentation ) m_showPresentation->setEnabled( ok );
     if ( ok )
     {
@@ -1854,6 +1874,7 @@
         m_migrationMessage->setVisible( false );
         m_topMessage->setVisible( false );
         m_formsMessage->setVisible( false );
+        m_signatureMessage->setVisible( false );
     }
 #ifdef OKULAR_KEEP_FILE_OPEN
     m_keeper->close();
@@ -1912,6 +1933,23 @@
     m_bottomBar->setVisible( showBottom );
 }
 
+void Part::slotShowSignatures()
+{
+   bool showSignaturePanel = m_showSignaturePanel->isChecked();
+   bool signaturePanelVisible = m_panel->isVisible();
+   if ( showSignaturePanel )
+   {
+       if ( !m_sidebar->isSidebarVisible() )
+            m_sidebar->setSidebarVisibility( true );
+       if ( !signaturePanelVisible )
+            m_sidebar->setCurrentItem( m_panel );
+    }
+    else
+    {
+        m_sidebar->setCollapsed( signaturePanelVisible );
+    }
+}
+
 void Part::slotFileDirty( const QString& path )
 {
     // The beauty of this is that each start cancels the previous one.
@@ -2044,7 +2082,7 @@
     }
     else if ( !oneShot )
     {
-        // start watching the file again (since we dropped it on close) 
+        // start watching the file again (since we dropped it on close)
         setFileToWatch( localFilePath() );
         m_dirtyHandler->start( 750 );
     }
@@ -3400,6 +3438,8 @@
     // attach the actions of the children widgets too
     m_formsMessage->addAction( m_pageView->toggleFormsAction() );
 
+    m_signatureMessage->addAction( m_showSignaturePanel );
+
     // ensure history actions are in the correct state
     updateViewActions();
 }
diff --git a/ui/signaturepanel.h b/ui/signaturepanel.h
--- a/ui/signaturepanel.h
+++ b/ui/signaturepanel.h
@@ -35,9 +35,14 @@
 
         // inherited from DocumentObserver
         void notifySetup( const QVector<Okular::Page *> &pages, int setupFlags ) override;
+        // inherited from QWidget
+        bool event( QEvent *event ) override;
 
         void setPageView( PageView *pv );
 
+    Q_SIGNALS:
+        void signaturePanelVisible( bool visible );
+
     private Q_SLOTS:
         void activated( const QModelIndex& );
         void slotShowContextMenu();
diff --git a/ui/signaturepanel.cpp b/ui/signaturepanel.cpp
--- a/ui/signaturepanel.cpp
+++ b/ui/signaturepanel.cpp
@@ -136,6 +136,14 @@
     }
 }
 
+bool SignaturePanel::event( QEvent *e )
+{
+    if ( e->type() == QEvent::Show || e->type() == QEvent::Hide )
+        emit signaturePanelVisible( isVisible() );
+
+    return QWidget::event( e );
+}
+
 SignaturePanel::~SignaturePanel()
 {
     Q_D( SignaturePanel );