A proof shows how your creative will appear on a specific unit. Reviewing proofs is the last chance to catch a problem while it is still cheap to fix.
Where To Find Them
Two sections of the Creatives tab handle this stage:
Review — work through artwork unit by unit.
Proofs — the design proofs themselves.
What To Look For
A proof is worth real attention rather than a glance. The things that most often go wrong:
Text too close to the edge. Large-format printing needs safe margins, and copy that looks fine on screen can be trimmed on the board.
Legibility at distance. Out-of-home is read from far away and often at speed. Detail that works on a monitor may vanish in situ.
Aspect ratio. Artwork stretched or squashed to fit is immediately obvious on a printed board.
Contrast. What reads well backlit may not read at all in daylight, and vice versa.
Working Through Them Efficiently
On a large campaign there can be a great many proofs, and reviewing them all with equal care is not realistic. Prioritise:
Unusual sizes first. Standard formats are usually fine because the artwork was built for them. Odd dimensions are where problems hide.
Then your highest-value sites. A mistake on your flagship board matters more than on a small poster.
Then everything else, more quickly.
*Note: If you spot a problem affecting one size across many units, fix the artwork once and re-supply for all of them rather than working through unit by unit.
Timing
Proofs sit between artwork supply and production, so they are on the critical path to launch. Leaving them unreviewed holds up printing and installation.
Review them as they arrive rather than in one batch near the deadline — a rejection discovered late can mean a unit runs blank.