A portion of a digital image is displayed where the portion that is displayed depends upon a mask. After the portion of the digital image is displayed, a change to the mask is received. It is determined, based at least in part on the received change to the mask, a transformation to be applied to the digital image. A new portion of the digital image is displayed based at least in part on the changed mask and the determined transformation, where the new portion that is displayed has the same center point as the previously displayed portion.