A set of identical prints made from the same printing surface. Editions may be limited or unlimited in number. Often a certain number of prints—including artist’s proofs, printer’s proofs, and hors commerce (not for sale)—are made at the same time but kept apart from the numbered edition. Each print in a limited edition is usually numbered in the lower left margin. In an edition of 100, for example, they would be numbered 1/100, 2/100, etc.