Showing the Pointer During a Presentation
You can set up your slideshow so that the pointer appears only on slides containing
hyperlinks or movies, or only when the mouse moves.
To specify pointer options:
Choose Keynote > Preferences, and then click Slideshow.
Select “Show pointer only on slides with hyperlinks or movies” or “Show pointer when
the mouse moves.”
If you opt to show the pointer only on slides with hyperlinks or movies, you can hide
the pointer during the slideshow by pressing the C key.