You can use the following keys to control a slide show.
To do this:
Press this:
Advance to the next slide
RIGHT ARROW or right mouse button
Return to the previous slide
LEFT ARROW or left mouse button
Pause a slide show
PAUSE (press again to resume)
Return to first slide
HOME
Advance to last slide
END
Stop a slide show
ESC
Open the Slideshow Control Panel
SHIFT+F1
Erase scribbles
DELETE