How to Print a Picture Across Multiple Pages (Poster)

When to use a tiled poster

A classroom display, a birthday banner, a map, a pattern you need bigger than one sheet allows. A home printer only puts out one page at a time, so the picture gets cut into tiles, each printed as large as a page allows.

How to print a poster on multiple pages, step by step

Open Printer App and tap Poster Print on the Home tab.
Tap Select Image and pick a photo. Change Image swaps it later.
Under Grid Size, choose 2×2 (4 pages), 3×3 (9 pages) or 4×4 (16 pages).
Set Overlap between 0 and 20 mm; the default is 10 mm. The overlap repeats a strip of the picture on neighbouring tiles. As the app puts it: Overlap area helps align pages when assembling.
Check the preview, then tap Share / Save PDF and look at the PDF before you use 16 sheets of paper.
Tap Print Poster (4 pages) (the number follows your grid) and print on plain Letter or A4 paper.

How big will the poster be?

Each tile scales to fit a US Letter page (8.5×11 in). The finished size is roughly the number of columns times the printed tile — these are nominal numbers before your printer's own margins shrink things slightly, and before you trim off the overlap.

Nominal poster size from a 12-megapixel iPhone photo
Grid	Pages	Landscape photo (4032×3024)	Portrait photo (3024×4032)
2×2	4	17 × 12.75 in	16.5 × 22 in
3×3	9	25.5 × 19.12 in	24.75 × 33 in
4×4	16	34 × 25.5 in	33 × 44 in

With the default 10 mm overlap on a 2×2 landscape poster, each tile grabs about 2109 × 1605 pixels of the photo instead of 2016 × 1512, and prints roughly 8.5 × 6.47 in on the page.

How to put the pages together

Lay the pages out by their labels: each one reads Page n/N with its row and column in small grey text.
On every tile except the last column, trim the right edge; on every tile except the last row, trim the bottom edge.
Slide each trimmed edge over the overlap of the neighbour until the picture lines up.
Tape on the back, row by row, then join the rows.

Common mistakes

Starting from a small image. A screenshot or a web picture goes soft fast at 4×4 — use the original photo, not a downloaded copy.
Printing on A4 when the tiles are built for Letter. iOS scales them down, so the finished poster comes out a touch smaller than the table above says.
Setting Overlap to 0 mm to save paper — don't. Tiny printer margin differences leave white gaps you can't hide without it.

Questions and answers

Can I print an image on multiple pages for free?

You get one free use of Poster Print; after that it needs Pro. The PDF from Share / Save PDF can be reprinted any time.

What is the largest poster?

A 4×4 grid, 16 pages. From a normal iPhone portrait photo that works out to roughly 33 × 44 inches before printer margins.

Can I choose 2×3 or 3×4?

No — the grid stays square: 2×2, 3×3 or 4×4 only.

Does it print borderless?

The app scales each tile to the page; whether you end up with a white border depends on your printer and the options it offers in the print sheet.

How to print multiple photos on one page from iPhone or iPad · Printer App

How to print one picture across multiple pages as a poster