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Practical guide · Poster Tiled Printing

Print an image across A4 or Letter sheets at a real size

Want a large poster from an ordinary printer? Start with the finished width or height, then plan how it fits across the sheets. Leave room for printer margins, overlap and any cut marks. More pixels or more sheets do not create detail missing from the source.

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The idea, illustrated
A large poster, an ordinary printer. Delegation at its finest.
Your next steps

Step by step

  1. Choose the image or PDF page

    Choose an image, or select and confirm one page from a PDF.

  2. Set paper and finished size

    Choose A4 or Letter and portrait or landscape paper. Set one finished dimension in millimeters.

  3. Review the sheet layout

    Review margins, overlap, cut marks and labels. The preview shows every sheet.

  4. Keep the scale check

    Keep the separate 50 × 50 mm calibration sheet enabled for a scale check.

  5. Create, print and measure

    Create the PDF. Print at Actual size / 100%, not Fit to page. Measure the calibration square before assembling a large poster.

A concrete example

A measured layout from the built-in example

Before

740 × 444 px image · finished width 370 mm

After

370 × 222 mm poster · 2 A4 tiles + calibration

A4 portrait, margins 10 mm, overlap 10 mm, cut marks and labels off. PDF dimensions were checked independently; a real printer has not been measured.

Open the tool for this exercise

Understand the details

A repeatable two-tile example

The included 740 × 444 pixel image is set to 370 mm wide. It becomes 370 × 222 mm. With A4 portrait, 10 mm margins, 10 mm overlap and both cut marks and labels disabled, it uses two poster sheets plus the calibration sheet.

There are 190 mm of printable width per sheet. The second tile starts at 180 mm: the repeated 10 mm helps you line up the sheets. The final PDF was independently checked as three A4 pages. No physical print test is claimed.

Labels need real space

Cut marks reserve 4 mm around the image area; labels reserve a 5 mm footer. Both can change the sheet count. Enable them according to the assembly method you intend to use, then inspect the updated layout.

For PDF input, choose one actual page. It is rendered to bounded pixels before tiling, so vectors and searchable text are not retained. The two-page sample lets you verify that selecting page 2 really uses the green second page.

Scale is different from sharpness

The example is only 50.8 pixels per printed inch at 370 mm wide. That is an honest low-resolution warning, not an export failure. Enlarging it cannot create detail missing from the source.

Images are limited to 10 MiB and 20 megapixels. PDF input allows one selected page from a document up to 25 MiB and 100 pages. Output is bounded to 100 sheets including calibration. Printer drivers can still scale the PDF; verify their settings and your measured print.