In this short tutorial we will see how to insert slide number in Keynote on Mac OS X Lion system. Keynote users can insert slide number using the option available as part of the Slide menu.
Click the Slide menu and select Show Slide Number on All Slides. This would display the number at the bottom of the slide. And if you do not want to display the slide number then again click Slide menu and select Hide Slide Numbers on All Slides.