Digital images comprise millions of pixels. The different ways they are calibrated and stored are known as file formats. If Save As is selected, a drop-down menu containing 17 different formats to choose from is presented. Many of these formats are only used in design or reproduction.
TIFF (Tagged Image File Format)
This is a standard format allowing images to be viewed, changed, and saved in most imaging software programs. A “profile” is attached which holds the digital information required for accurate printing and enables the image, size, colors, and contrast to be recognized on another computer. When saving as a TIFF, a box opens asking which compression is required. Usually, None is selected. However, for e-mailing TIFFs, you can use ZIP or LZW formats that reserve the quality.
JPEG (Joint Photographic Experts Group)
JPEGs are compressed files that remove pixels to reduce the file size, making them quicker to send as e-mail attachments. The reduction in quality will be noticeable, though selecting Save for Web from the File Menu will produce files of excellent quality. Digital camera record files as JPEGs, that can converted to and saved later as TIFFs.