To crop is to trim one or more of a picture's edges, or to place one or more of the edges of an image so that only part of a subject can be seen within the image.Examples: Mathew Brady (American, 1823-1896) Studio, Robert E. Lee (1807-1870), 1865, albumen silver print, 8 3/16 x 6 inches (20.8 x 15.3 cm), National Portrait Gallery, Smithsonian Institution, Washington, DC. Although this portrait was originally in a rectangular shape, the photographer chose to crop it to an oval shape.