Photoshop: File Types

Photoshop can read and write several image file types, each of which is appropriate for different purposes.

JPEG: General purpose; allows for variable levels of file compression at the increasing expense of image quality. (A “lossy” file format.)

TIFF: A good archival file format. Supports layers. Allows for file compression using the LZW method (a “lossless” method).

PSD: Photoshop’s native file format. Supports layers, vector and shape information, text.

GIF: Works only with limited color palettes; appropriate for use on websites.

PDF: Useful if you’re sending information to someone who doesn’t have Photoshop.

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