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Photos can be added to Keynote presentations from the iPad's picture gallery app. While resizing a picture with one finger, the user can touch a second photo to have the first photo match its size.
Photos can be zoomed into using multitouch and rotated by twisting.
Presentations can be sent via email, uploaded to iWork.com or exported as a Keynote or PDF file. They can also be viewed on a TV via an optional connector, with the iPad acting as a control mechanism for the slideshow.