1. A method in a computer system for displaying a document, the method comprising: retrieving from the document an indication that an image described by a page description language is to be displayed within a display area with a bounce visual effect, the display area having borders; and repeating the following steps to present the visual effect of bounding the image between the borders of the display area: scrolling the image within the display area in a current direction; and when a portion of the image is scrolled to intersect a border of the display area, reversing the direction of scrolling the image within the display area so that the image scrolls in a new current direction that is reverse of the previous current direction.