pointed at their images. Early Photo Story prototype versions encouraged people to point at their images using the mouse, as the pointing would affect the algorithm that generated the pans and zooms. The same research showed that users did not like the sound of their voice and tended to record their narration over and over again. This made the narration less spontaneous and the resulting stories less interesting if people were unable to express themselves clearly. Therefore, the early prototype had only one button, called the "Oops!" button. The research showed that if there was an OOPS! button available to undo their actions, people would be assured by its presence but would not use it unless they truly made a mistake during narration. Photo Story was not included with Windows XP, though it was and continues to be made available as a free download to authenticated users. Vista and Windows 7 both include Photo Story type applications (Windows Movie Maker and Windows DVD Maker), however some users still prefer the flexibility offered by the original. Limitations The maximum number of images that may be imported in a single batch is 200. The maximum image size is 72,300 (width) x 7,200 (height) pixels. The maximum output resolution offered by Microsoft is 1024 x 768, however 3rd parties have developed new output .prx 'profiles' that, if placed in your \Photo Story 3 for Windows\Profiles\1033 sub-folder, can be selected at output time. The single supported video output format is .wmv (using the Windows Media Video 9.1 Image codec, a subset of Windows Media Video). The single supported audio output format is AAC (Advanced Audio Coding). The 'crop' and 'zoom' tool is fixed at 4:3 aspect ratio. To support 16:9 wide screen output (which is possible to obtain at output time using a third-party profile), it is necessary to 'pre-distort' all your imported images by adjusting the image height to 133.33%. The chargeable 'Roxio' plug-in (now owned by Sony) allows users to 'burn' their completed 'story' direct to a DVD or CD. Sonic MyDVD (v5.5 or higher) is required if you want to edit the disc and add more stories or movies, thus more available storage. Users should avoid any 'crop' or 'zoom' size below their intended output resolution - ideally, stop at twice the output size. If a smaller crop or zoom is required, significantly better results will be achieved by resizing the