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The PSD format is Adobe's proprietary format for Photoshop documents.
Format contents[]
- Raster layers
- Raster artwork
- Blending modes
- Layer opacity
- Layer flow
- Layer styles
- Vector layers
- Masks
- Layer masks
- Vector masks
- Layer groups
- Layer comps
- Channels
- Color mode and depth
- Alpha channels
- Metadata
Format history and limitations[]
Although the PSD format can be opened by all recent versions of Photoshop, newer versions have features and increased limits that may be troublesome for older versions.
PSB format[]
More recent versions of Photoshop can make use of the PSB (Photoshop Big) format, which is mainly designed for the larger filesizes and more powerful processing available on 64-bit systems.