Slide 1
To change slides, click the buttons on the  upper left or upper right of each web page. Press the F11 key to enter (or exit) full-screen mode with a PC. To enter full-screen mode with Safari (macOS), click the green button at the top left of the window or press Fn + F (in old systems it is Cmd + Ctrl + F.)  To exit full-screen mode with Safari (macOS), either press Escape or move your cursor to the top of the screen for about a second, then  click the green button at the top left of the window.            To zoom in or out with a PC, type Ctrl + or Ctrl –.         To zoom in or out with Safari (macOS), type Cmd + or Cmd –.