File formatįile header has fixed length of 26 bytes and contains the basic properties of the image. Photoshop file format is divided into five major portions with many length markers to move between sections. Photoshop large document format is available once the feature of file handling pane of Photoshop’s preferences dialog box is enabled. PSB is also known as large format size for photoshop and supports all the photoshop features like layers, effects and filters.Photoshop can convert PSB file to PSD, JPG, PNG, EPS, GIF and other formats as well. PSDs, on the other hand, can be at maximum upto 2 GB and image dimensions of 30,000 pixels. More specifically, PSB files can be as large as 4 EB (over 4.2 billion GB) with images that have a height and width of up to 300,000 pixels. Files having 30,000 by 30,000 pixels in size are saved with PSD extension and files larger than PSD upto 300,000 by 300,000 pixels are saved with PSB extension known as “Photoshop Big”. Adobe photoshop saves files in two formats.
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