Other than being able to quickly display images, it can also be used to display a slide show of all the images in a folder.īeginning the slide show is as simple as clicking on the blue button at the bottom centre of the window. Windows Photo Viewer (previously known as Windows Picture and Fax Viewer) is a small but extremely useful application that is installed on every Windows 7 computer, and by default handles all the popular image file types – PNG, BMP, JPG, ICO, GIF etc.