How do I change the author of a presentation?
1. Click on Manage Slides from the Edit Presentation screen.
2. Click Edit beside the thumbnail image of the slide you want to apply the author photo to.
3. Click the radio button beside "Use specific author" and select the author.
You may change the image and information on one slide or all the slides in the presentation.
Note: This ONLY changes the information that is displayed, it does not give the person selected access to the presentation as an author. If you want the new author to have permissions to edit the presentation, you must make them the author of the presentation by changing the author.
For more information please see Managing your Slides.