crop mark

Noun

cropmark (plural cropmarks)

1. A sign of the former location of some feature (such as a wall or a ditch) revealed by variations in plant growth on the surface.
   • The earliest air photograph showing cropmarks at Mucking appears to be a high level vertical view of the area taken by a German aircraft of the Luftwaffe in 1943. This photograph, however, only shows a few small and indistinct marks.2013, Ann Clark, Excavations at Mucking: Volume 1: The site atlas, English Heritage, →ISBN, page 23
2. Any of the marks placed at the corners of a form to indicate where the page is to be trimmed.
   • The new paths are automatically selected; if you want to remove the guides, press Delete. Set Cropmarks adds standard cropmarks to your artwork.1992, David A. Holzgang, The Adobe illustrator 3.2: designer's guide, Sybex Incorporated