The centerfold or centrefold of a magazine refers to a gatefolded spread, usually a portrait such as a pin-up or a nude, inserted in the middle of the publication, or to the model featured in the portrait. In saddle-stitched magazines (as opposed to those that are perfect-bound), the centerfold does not have any blank space cutting through the image. Though the term has become linked in the public consciousness with erotic material or models, many other magazines such as Life, Time and National Geographic have published fold-out spreads on other subjects.