Optimization options for PNG-24 formatPNG-24 is suitable for compressing continuous-tone images; however, it produces much larger files than JPEG format. (See About PNG-24 format.) The advantage of using PNG-24 is that it can preserve up to 256 levels of transparency in an image (whereas JPEG saves pixels as fully opaque). To save an image with multilevel transparency, select Transparency. For more information about the Interlaced, Transparency, and Matte options, see Optimization options for GIF and PNG-8 formats. |