I have a series of events (photos). They are all of the same EVENT (for example a wedding reception). When I load them through Project Media they are only about 5 or so seconds long. I want to extent their time (length) to at least 10 - 15 seconds (for example). How can I do that in one operation (if I can), since I have 20 to 30 events (photos), without doing them one by one?