Overview
Legacy and Influence
Flattening: If you are finished editing, you can flatten your layers to reduce file size, though it is recommended to keep a layered .PSD version for future edits. adobe photoshop cs1
Camera RAW 2.0 Support: Photoshop CS introduced built-in support for RAW files from digital cameras, allowing photographers to manipulate high-quality uncompressed data directly within the software. Overview Legacy and Influence