What is a bleed?
Bleed is the term for printing that goes right to the edge of the paper. To create a bleed, make your document one-eighth of an inch too large in all four directions. For example, the layout dimensions for a 4 x 6 inch postcard would be 4.25 x 6.25 inches. Then, when the design is created, images are stretched all the way to the edge. After printing, the additional .125 inch on each side is trimmed off. This gives the appearance that the image “runs” right off the edge.