Galley proof  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. Proof, in the typographical sense, is a term that dates to around 1600. The primary goal of proofing is to create a tool for verification that the job is accurate. All needed or suggested changes are physically marked on paper proofs or electronically marked on electronic proofs by the author, editor, and proofreaders. The compositor, typesetter, or printer receives the edited copies, corrects and re-arranges the type or the pagination, and arranges for the press workers to print the final or published copies. Galley proofs or galleys are so named because in the days of hand-set letterpress printing in the 1650s, the printer would set the page into galleys, namely the metal trays into which type was laid and tightened into place. A small proof press would then be used to print a limited number of copies for proofreading. Galley proofs are thus, historically speaking, galleys printed on a proof press. From the printer's point of view, the galley proof, as it originated during the era of hand-set physical type, had two primary purposes, those being to check that the compositor had set the copy accurately (because sometimes individual pieces of type did get put in the wrong case after use) and that the type was free of defects (because type metal is comparatively soft, so type can get damaged). Once a defect-free galley proof was produced, the publishing house requested a number of galley proofs to be run off for distribution to editors and authors for a final reading and corrections to the text before the type was fixed in the chase for printing. An uncorrected proof is a proof version (on paper or in digital form) which is yet to receive final author and publisher approval. The term may also appear on the covers of advance reading copies; see below. These days, because much typesetting and pre-press work is conducted digitally and transmitted electronically, the term uncorrected proof is more common than the older term galley proof, which refers exclusively to a paper proofing system. However, if a paper print-out of an uncorrected proof is made on a desk-top printer or copy machine and used as a paper proof for authorial or editorial mark-up, it approximates a galley proof, and it may be referred to as a galley.