With the Slide Show dialog box, you can customize panning and zooming in each slide. You determine the start point and end point by positioning the bounding boxes on an area of a photo. The boxes are resizable; the smaller you make a box, the more dramatic the pan and zoom effect becomes. You can also add additional pan and zoom start and end points to a slide. The end point of the previous pan and zoom marks the beginning of the next pan and zoom.