A café menu looks perfect on screen, but the printed version has a thin white strip along one coloured edge. The design may have ended exactly at the intended cut. Small trimming variations then exposed unprinted paper. Bleed is the extra artwork that gives the cutting process room to move.
Adobe’s explanation of bleed and slug areas distinguishes this extended artwork from the finished page and from production information outside it. Bleed is not simply a coloured border added inside the page.
Ask the printer before setting up the file
Get the required finished dimensions, bleed amount, safe area and export settings. Do not assume that a measurement from a previous supplier applies to the new job. Folded items, bound books and simple cards can have different production requirements.
Extend a background photograph or colour beyond the trim line to the specified bleed boundary. Keep essential text and logos inside the printer’s recommended safe area. These are different operations: extending an image does not protect text placed too close to the cut.
Check the exported PDF, not just the canvas
Open the file you will actually send. Confirm that the intended bleed has been included, that page dimensions match the specification and that any requested printer’s marks are present. Export settings can omit information that was visible while designing.
As a practical review, imagine the cut shifting slightly in either direction. Would the background still cover the edge? Would the price or phone number remain comfortably readable? This visual check does not replace the supplier’s technical preflight, but it catches an easily overlooked design problem.
Keep the approved print file separate from a screen-only version. A social-media image and a production PDF serve different purposes, even when they share the same menu artwork.