When I start a presentation from my dropbox, it will start Keynote.
But when I go through my apps on the iPad I don't see keynote anywhere...
I like to start Keynote as an app and not from the presentation in my dropbox.
Keynote, as with other app's should be found on the Home Screen, on its own or located in a folder. It could also be located on the quick launch bar at the bottom of the Home screen.
The icon for Keynote is:
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