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diff --git a/sdext/source/presenter/PresenterHelpView.hxx b/sdext/source/presenter/PresenterHelpView.hxx
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+++ b/sdext/source/presenter/PresenterHelpView.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERHELPVIEW_HXX
+#define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERHELPVIEW_HXX
+
+#include "PresenterController.hxx"
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/awt/XPaintListener.hpp>
+#include <com/sun/star/awt/XWindowListener.hpp>
+#include <com/sun/star/drawing/framework/XView.hpp>
+#include <com/sun/star/drawing/framework/XResourceId.hpp>
+#include <com/sun/star/frame/XController.hpp>
+#include <memory>
+
+namespace sdext::presenter {
+
+class PresenterButton;
+
+typedef cppu::WeakComponentImplHelper<
+    css::drawing::framework::XView,
+    css::awt::XWindowListener,
+    css::awt::XPaintListener
+    > PresenterHelpViewInterfaceBase;
+
+/** Show help text that describes the defined keys.
+*/
+class PresenterHelpView
+    : private ::cppu::BaseMutex,
+      public PresenterHelpViewInterfaceBase
+{
+public:
+    explicit PresenterHelpView (
+        const css::uno::Reference<css::uno::XComponentContext>& rxContext,
+        const css::uno::Reference<css::drawing::framework::XResourceId>& rxViewId,
+        const css::uno::Reference<css::frame::XController>& rxController,
+        const ::rtl::Reference<PresenterController>& rpPresenterController);
+    virtual ~PresenterHelpView() override;
+
+    virtual void SAL_CALL disposing() override;
+
+    // lang::XEventListener
+
+    virtual void SAL_CALL
+        disposing (const css::lang::EventObject& rEventObject) override;
+
+    // XWindowListener
+
+    virtual void SAL_CALL windowResized (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowMoved (const css::awt::WindowEvent& rEvent) override;
+
+    virtual void SAL_CALL windowShown (const css::lang::EventObject& rEvent) override;
+
+    virtual void SAL_CALL windowHidden (const css::lang::EventObject& rEvent) override;
+
+    // XPaintListener
+
+    virtual void SAL_CALL windowPaint (const css::awt::PaintEvent& rEvent) override;
+
+    // XResourceId
+
+    virtual css::uno::Reference<css::drawing::framework::XResourceId> SAL_CALL getResourceId() override;
+
+    virtual sal_Bool SAL_CALL isAnchorOnly() override;
+
+private:
+    class TextContainer;
+
+    css::uno::Reference<css::uno::XComponentContext> mxComponentContext;
+    css::uno::Reference<css::drawing::framework::XResourceId> mxViewId;
+    css::uno::Reference<css::drawing::framework::XPane> mxPane;
+    css::uno::Reference<css::awt::XWindow> mxWindow;
+    css::uno::Reference<css::rendering::XCanvas> mxCanvas;
+    ::rtl::Reference<PresenterController> mpPresenterController;
+    PresenterTheme::SharedFontDescriptor mpFont;
+    std::unique_ptr<TextContainer> mpTextContainer;
+    ::rtl::Reference<PresenterButton> mpCloseButton;
+    sal_Int32 mnSeparatorY;
+    sal_Int32 mnMaximalWidth;
+
+    void ProvideCanvas();
+    void Resize();
+    void Paint (const css::awt::Rectangle& rRedrawArea);
+    void ReadHelpStrings();
+    void ProcessString (
+        const css::uno::Reference<css::beans::XPropertySet>& rsProperties);
+
+    /** Find a font size, so that all text can be displayed at the same
+        time.
+    */
+    void CheckFontSize();
+
+    /** @throws css::lang::DisposedException when the object has already been
+        disposed.
+    */
+    void ThrowIfDisposed();
+};
+
+} // end of namespace ::sdext::presenter
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */