Possible Duplicate:
Is there a way to add a timer to a Beamer presentation?
Is there a way to add a timer at the footline of a beamer presentation that will tell us how long the presentation has been going on?
Possible Duplicate:
Is there a way to add a timer to a Beamer presentation?
Is there a way to add a timer at the footline of a beamer presentation that will tell us how long the presentation has been going on?
Yes, by using the tdclock package, but this will require a Javascript-enabled viewer (and that means, AFAIK, Reader only). The package comes with an example Beamer presentation.