In addition to specifying how to crop artwork for output, you can also create and use multiple sets of crop marks within your artwork. Crop marks indicate where you want the printed paper to be cut. Crop marks are useful when you want to create marks around several objects on a page—for example, when printing a sheet of business cards. They are also helpful for aligning Illustrator artwork that you’ve exported to another application.

Crop marks differ from the crop area in the following ways:

• Crop areas specify the printable boundaries of artwork, whereas crop marks don’t affect the printed area at all.

• You can activate only one crop area at a time, whereas you can create and display multiple crop marks.

• The crop area is indicated by visible but non-printing marks, whereas crop marks are printed with registration black (so that they print to every separation plate, similar to printer’s marks).