PNG is the abbreviation for Portable Network Graphic. The World Wide Web Consortium (http://www.w3.org) has designed this raster format specifically for Internet pages. It is possible to store scanned images as PNG files and edit them later with a wide range of programs. PNG is a pure pixel-based format, i.e. when exporting to PNG, all the elements drawn in Arbortext IsoDraw are converted into a raster image.