How to Use Your Mouse As a Pointer During a Keynote Presentation
Keynote, the Apple application similar to Microsoft PowerPoint, allows you to create and run slideshow-style presentations. When running a presentation in Keynote, you can use the mouse connected to your Mac in several ways. Clicking the mouse moves the presentation forward to the next slide, but by default, the pointer only appears in slides that contain movies or hyperlinks. You can change the setting so that the pointer appears any time you move the mouse.
Open the presentation in Keynote.
Click the "Keynote" menu, and select "Preferences."
Select the "Slideshow" icon at the top of the window. Select the "Show Pointer When the Mouse Moves" radio button. Click the red button at the top of the window to close the "Preferences" window.
Click the "Play" button in the upper left corner of the Keynote window when you are ready to deliver the presentation.
Move the mouse to use it as pointer during the presentation.