Where multi-page jobs go wrong
A single flyer is one page, one file, no ambiguity. A 24-page brochure, a staff handbook or an annual report is a different kind of order. The file has to tell the printer not just what each page looks like but how the pages relate: which is the cover, what order they run in, whether any two pages are meant to be seen as one picture across the fold. Get that wrong and the file either bounces at preflight or, worse, prints with the pages in the wrong sequence.
Most of the confusion comes from three things: the difference between pages and spreads, the page count rules for folded and stitched documents, and how to handle content that runs across the gutter. This guide takes each in turn, from the point of view of someone uploading a file to an online print service.
Pages versus spreads: what the printer needs
When you look at an open brochure you see two pages side by side. That pair is a reader's spread. Designers naturally work in spreads because that is how the reader sees the result. But the press does not print reader's spreads. It prints large sheets that are folded and trimmed, and the pages that share a sheet are not the ones that sit side by side in the finished piece. Page 1 shares a sheet with page 24, page 2 with page 23, and so on. Those pairs are printer's spreads, and arranging them is called imposition.
The rule that follows: export your PDF as single pages, not spreads. One page per PDF page, in reading order, from the front cover to the back cover. The printer's imposition software takes single pages and builds the printer's spreads correctly. If you send reader's spreads instead, someone has to split them apart first, and if the split is not perfect you get a thin white line down the gutter or a page shifted by a millimetre.
The only time a spread PDF is right is when the finished piece really is one flat sheet, such as a tri-fold leaflet. That is a single page with fold marks, not a multi-page document.
Page counts and what they must divide by
The binding method dictates the page count.
- Saddle stitched (folded sheets stapled through the spine): total pages must be a multiple of 4, because each sheet folded once gives four pages. 8, 12, 16, 20, 24, 28, 32 and so on. A 22-page document cannot be saddle stitched; it becomes 24 with two blank pages, or it gets cut to 20.
- Perfect bound (pages glued into a wrap-around cover): the inside pages are usually printed in signatures of 4, 8 or 16, so the count should still be a multiple of 4, and the cover is a separate 4-page file (outside front, inside front, inside back, outside back) with a spine width that depends on the page count and paper.
- Wire-O or spiral bound: any page count, since every leaf is separate. Even numbers are still tidier if you print both sides.
Count your pages before you finalise the design, not after. If you land on 22, decide now whether page 22 becomes a notes page and page 23 a blank, or whether two pages of content get merged. A blank page is fine as long as you supply it in the PDF as an actual blank page; do not simply leave it out and expect the printer to guess where it goes.
Content that crosses the gutter
A photo or headline that runs across two facing pages is a standard design move, and it works in print as long as three things are true.
- The two halves are placed on the correct single pages (the left half on an even page, the right half on the following odd page) with the image positioned so that it continues correctly when the pages meet. Exporting single pages from a spread-based layout does this automatically in InDesign and Affinity Publisher.
- Nothing important sits within about 5 mm of the gutter. In a saddle-stitched booklet the inner margin of the middle pages effectively shrinks because of the fold; in a perfect-bound book the glue swallows a few millimetres on every page. Faces, text and logos should stay clear of that zone.
- The image resolution holds up across the full width. A photo that is fine on one page may be stretched across two, doubling its size and halving its effective resolution. Check it at 100 percent before you export.
Bleed, marks and the cover
Every page of a multi-page PDF needs the same bleed, normally 3 mm on all four sides, including the inner edge. It feels wrong to add bleed to the gutter side, but the imposition software needs it there, and your export dialog should apply it to every page uniformly. Add crop marks only if your print service asks for them; many online systems prefer a clean PDF with bleed and no marks, because their workflow adds its own.
For a perfect-bound job, treat the cover as a separate file. It is one wide page: back cover, spine, front cover, in that order from left to right, plus the inside cover as a second page. Ask the printer for the spine width for your exact page count and stock before you build it; a spine that is 2 mm too narrow wraps the front cover text around the corner.
A pre-upload checklist
- Single pages, not spreads, in reading order from front cover to back cover.
- Page count divisible by 4 for stitched or perfect-bound work, blanks included as real pages.
- 3 mm bleed on all sides of all pages; nothing important within 5 mm of any edge or the gutter.
- Fonts embedded, images at 300 ppi at final size, colours in CMYK. See our notes on vector versus raster content if logos look soft.
- Cover supplied separately for perfect binding, with spine width confirmed.
- File name includes the page count and version, such as handbook-24pp-v3.pdf, so nobody prints an earlier draft.
Ordering booklets and brochures through our service
Our booklet printing service accepts a single multi-page PDF and runs it through a preflight that checks page count against the binding you selected, confirms bleed on every page, and produces a page-by-page proof that shows the document in reading order, so you can confirm the sequence before anything is imposed. For perfect-bound work we send the spine width once you confirm the page count and stock.
If your document is in spreads, or the page count does not divide, upload it anyway and tell us. Splitting spreads and inserting blanks at the right position is a routine part of the job. The full range of binding options is on the booklets and brochures page, and for anything unusual, a folded map section or a gatefold cover, contact us before you build the file and we will send the exact specification.
