In printing and publishing, proofs are the preliminary versions of publications meant for review by authors, editors, and proofreaders, often with extra-wide margins. Galley proofs may be uncut and unbound, or in some cases electronically transmitted. They are created for proofreading and copyediting purposes, but may also be used for promotional and review purposes.[1][2][3]

First galley proof of A la recherche du temps perdu: Du côté de chez Swann with handwritten revision notes by Marcel Proust
Bill Hosokawa pulling a galley proof while working as a newspaper editor in the Heart Mountain Relocation Center, 1943

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