In a nutshell
How to use this presentation
Press the 'next' button below to start it (a triangle facing right). You need to advance this presentation by pressing the same button again and again. You can turn on autoplay, by choosing 'more' - 'autoplay'. You can also watch the presentation in fullscreen, by choosing 'more' - 'fullscreen'.
If you want to start the presentation again, place the mouse cursor over it, click the left button and choose 'Back to start' in the menu that appears.