Page boxes must reflect the intended product
Print preparation guide
Prepare a PDF for Print: Check the File You Actually Send
A practical PDF handoff covering trim, bleed, fonts, image resolution, output settings and a reopened-file review.
Quick answer
Start with the printer’s written specification and use its PDF preset where supplied. Verify page size, bleed, fonts and placed-image effective PPI in the exported PDF. Check crop marks and color settings only against that provider’s request. Then reopen the exact final file and approve a proof before an important print run.
A4 trim 210 × 297 mm + 3 mm bleed per edge = 216 × 303 mmInspect the exported PDF, not only the source
Use one clearly identified approved version
Decision table
A4 flyer handoff: an illustrative specification
| Item | Example requirement | Check in the PDF |
|---|---|---|
| Trim | 210 × 297 mm | TrimBox / finished dimensions |
| Bleed | 3 mm on every edge | Background extends beyond trim |
| Image | 300 PPI at placed size | Effective resolution after scaling and crop |
| Fonts | Embedded if licensed and requested | No substitution or missing glyphs |
Get the specification before choosing a preset
Ask for finished size, page count, orientation, bleed, safe margin, color profile, accepted PDF standard and whether marks are wanted. A preset titled High Quality Print is not proof that it matches the provider. If the printer supplies a preset or template, start there and keep a copy of its instructions.
Different products have different page conventions. A booklet may require individual pages rather than reader spreads; a folded leaflet may use a supplied panel template. Do not infer the imposition from how it looks on screen. Confirm what the printer wants to receive before assembling the file.
Check geometry without inventing bleed
For the example A4 flyer, the trim is 210 × 297 mm and the background extends to 216 × 303 mm with 3 mm bleed per edge. Important text sits inside the printer’s safe margin. The larger artwork area does not change the finished A4 size. A white border created by extending the canvas is not a substitute for extending the actual background.
Crop marks indicate cutting positions, but add them only if requested. Avoid placing them inside the finished artwork. A PDF can contain page boxes that identify trim and bleed without needing a raster canvas whose dimensions include every mark. Inspect those boxes in a PDF production tool when available.
Look inside the exported file
A large PDF file can still contain low-resolution images. Inspect each placed image at its final size: a 1200-pixel-wide image placed at 8 inches is 150 PPI, even if another image in the same PDF is sharper. Increasing the export resolution does not create real detail in that source image.
Review fonts, symbols, transparency and color according to the provider’s workflow. Font embedding depends on the font’s permissions and export settings. Outlining text can be appropriate when specifically required, but keep editable text in the source and inspect the output for spacing changes, missing characters and fine-detail problems.
Close, reopen, and hand off one version
Open the final PDF in a viewer independent of the design document. Check every page for orientation, page order, unexpected blank pages, clipped text and background coverage. Examine both whole-page composition and close detail. Save the delivery file with a clear version name so the approved proof and sent artwork can be matched.
Tell the printer what has been checked and ask it to confirm any remaining preflight warnings. Do not silently dismiss a warning because the PDF opens. For a large or color-critical run, a physical proof can catch paper, ink or finishing differences that a geometric calculation cannot predict.
Practical workflow
Use this order before you export.
- Obtain the product specification and PDF preset.
- Set trim, extend real artwork into bleed and protect critical content.
- Export, reopen, and check every page and placed image.
- Match the approved proof to the delivery filename.
Sources and method
Check the requirement behind the number.
These guides explain repeatable calculations and planning ranges. The print provider's written specification remains the final production requirement.
Put the guide into practice
Calculate trim, bleed and safe area →Export is a step; reopening and checking the PDF is the handoff test.
Use the linked calculator with your own dimensions, then verify the result against the provider's production requirement.