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PSD file format
PSD – is an image created by one of the most popular graphic editors of Adobe Photoshop. Together with this format, a wide range of data from "Photoshop" is available, including texts, graphic layers or notes. The extension can support multiple shades of gray, monochrome images, as well as CMYK and RGB color models. Such files can be converted to various formats (JEPG, PNG and others) for the purpose of subsequent transfer or storage. After changing the format, all the layers are transformed into one, which does not happen when saving with the PSD extension. In this case, they are available for viewing and editing, which makes them especially useful for working with drafts of various documents. The format is irreplaceable when saving the intermediate results. It is supported by most versions of Photoshop, as well as other Adobe programs.
The PSD extension is characterized by the ability to support a variety of visualization options, including a mask, spot colors, two-color settings, clipping. In some cases, there are files with the .psb extension, which support a resolution limit of 30 thousand pixels in width and height. PSD files use the RLE compression algorithm, which allows to compress with minimal loss. However, they are still large, so it is better to use archivers for storing them on disk.
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