The Macintosh generic picture file is pict . Pict files can be used by virtually any Macintosh application. Windows will read .pict files, though it prefers the Microsoft implementation of pict, called either pcx or pic. TIFF is a method for storing a great deal of information about an image. TIFF, like most graphic file types, is actually a file compression method.
TIFF files tend to be extremely large but the results can be dramatic.
A graphic file is made up of pixels or picture elements. Each pixel is the intersection of the x and y axis. That location is called a pixel . Each pixel is how the computer holds color information. Most graphic programs will let you select sections of the picture or change the color of a single pixel.