Adobe Photoshop File Formats Specification
July 2010
This document has three chapters:
1. The Photoshop File Format describes the Photoshop PSD and PSB native file format in detail.
2. Other Document File Formats discusses Photoshop's handling of the EPS and TIFF file formats, which Photoshop can also create and read.
3. Additional File Formats describes the formats of other files used by Photoshop to store information about such items as colors, contours, curves, levels and so forth.
