The trim line, also called the cut line, is the exact outline of the finished piece. A 3.5 x 2 inch business card has a trim line at 3.5 x 2 inches, even though the file itself is a little larger because of the bleed around it. On a proof the trim line is usually drawn as a thin colored line so everyone can see where the paper will end.
Knowing where the trim line sits stops two problems at once: background art that falls short of the edge, and text that ends up too close to it. Designers place the trim line first, then build the bleed outside it and the safe area inside it.
Picture a tutoring center called Bright Path Learning approving a rack card. On screen the logo looks fine, but on the proof the trim line runs right through the bottom of the phone number. Seeing the line before printing saves a whole reprint.
In aiKit, Customer Proofs can show the cut and safe lines on a print proof once you enter the finished size, Pro Designer draws the trim line and safe margins as guides on a new print document, and Printer's Helper proofs show the cut and safe lines for every job.
Related terms
See it in practice
How to add bleed to a PDF for printing
Add 1/8 inch bleed to a PDF in plain words: aiKit extends the art past the cut, sets the print boxes, checks the file and gives you a proof to approve.
GuideHow to send a proof customers can approve from their phone
Send a design proof as a private link customers open on a phone, mark up with pins and approve with their typed name. No account needed for them.
Use casePrint-ready files for print shops: fix customer art by asking
Fix customer files by asking: add bleed, resize, check, set PDF boxes. Get a print-ready PDF, a file check and a proof link. Free to start.
Use caseOnline proofing for print shops: a clear, signed yes on every job
Send print proofs with cut and safe lines. Customers pin comments and approve by typed name from a phone, no account. Free to start with aiKit.
Use caseVirtual samples for promo products, in every color, with a spec sheet
Put a customer's logo on shirts, caps, mugs and signs in every color, check the decoration, and send a spec sheet and approval link. Free to start.