Editing Adobe Photoshop (section)

== {{anchor|PSD}} File format ==
{{Infobox file format
| name          = Photoshop document
| icon          = 
| logo          = 
| screenshot    = 
| caption       = 
| extension     = .psd
| mime          = image/vnd.adobe.photoshop
| type code     = 8BPS
| uniform type  = com.adobe.photoshop-image<ref>{{cite web |url=https://www.mbsplugins.eu/CGImageSourceSupportedTypes.shtml |title=CGImageSource.SupportedTypes |work=Claris FileMaker MBS Plug-in |publisher=MonkeyBread Software |access-date=May 21, 2023 |archive-date=December 30, 2020 |archive-url=https://web.archive.org/web/20201230132850/https://mbsplugins.eu/CGImageSourceSupportedTypes.shtml |url-status=live}}</ref>
| magic         = 
| owner         = [[Adobe Inc.]]
| released      = {{Start date|1990|02|19}}
| latest release version = 
| latest release date = <!-- {{Start date and age|YYYY|mm|dd/no}} -->
| genre         = 
| container for = 
| contained by  = 
| extended from = 
| extended to   = 
| standard      = 
| open          = no
| url           = {{URL|https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/}}
}}

Photoshop files have default file extension as .'''PSD''', which stands for "'''P'''hoto'''s'''hop '''D'''ocument".<ref>{{Cite web|title=What is PSD? What Opens a PSD? File Format List from WhatIs.com|url=https://whatis.techtarget.com/fileformat/PSD-Adobe-Photoshop-default|website=whatis.techtarget.com|access-date=May 12, 2020|archive-date=July 24, 2020|archive-url=https://web.archive.org/web/20200724234643/https://whatis.techtarget.com/fileformat/PSD-Adobe-Photoshop-default|url-status=live}}</ref> A PSD file stores an image with support for all features of Photoshop; these include layers with [[mask (computing)|masks]], [[Transparency (graphic)|transparency]], text, [[alpha compositing|alpha channels]] and [[spot color]]s, [[clipping path]]s, and [[duotone]] settings. This is in contrast to many other file formats (e.g., .JPG or .GIF) that restrict content to provide streamlined, predictable functionality. A PSD file has a maximum height and width of 30,000 pixels, and a size limit of two gigabytes.

From the beginning, Photoshop could save files in other formats, including TIF, JPEG, and GIF. These files are smaller than PSD files because they lack the editable features of a PSD file. These formats are required to use the file in publications or on the web. Adobe's discontinued program [[PageMaker]] required TIF format.

Photoshop can also create and use files with the extension .PSB, which stands for "Photoshop Big" (also known as "large document format").<ref>{{Cite web|title=What's a PSB File and How Do You Open One?|url=https://www.lifewire.com/psb-file-2622193|website=Lifewire|language=en|access-date=May 12, 2020|archive-date=May 27, 2020|archive-url=https://web.archive.org/web/20200527150349/https://www.lifewire.com/psb-file-2622193|url-status=live}}</ref> A PSB file extends the PSD file format, increasing the maximum height and width to 300,000 pixels and the size limit to around 4 [[exabyte]]s. PSD and PSB formats are documented.<ref>{{cite web|title=Adobe Photoshop File Formats Specification|author=Adobe|url=https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/|date=July 2010|access-date=August 20, 2014|archive-date=February 4, 2016|archive-url=https://web.archive.org/web/20160204142319/https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/|url-status=live}}</ref>

Because of Photoshop's popularity, PSD files are widely used and supported to some extent by most competing software, including [[GIMP]], [[Affinity Photo]], and [[Clip Studio Paint]]. The .PSD file format can be exported to and from Adobe's other apps, such as [[Adobe Illustrator]], [[Adobe Premiere Pro]], and [[Adobe After Effects|After Effects]].