Commonly
used to save photographs. JPEG format retains all color information
in an image but compresses file size by selectively discarding data.
JPEG is a standard format for displaying images over the web. For
more information, see JPEG export options. You can also save an image as a JPEG file
using the Save For Web & Devices command.
Note: Artifacts,
such as wave-like patterns or blocky areas of banding, are added
to a file each time you save the file as a JPEG. Always save JPEG
files from the original image, not from a previously saved JPEG.