PDF Booklet Order Helper

Why booklet order looks wrong

A saddle-stitched booklet is made from sheets folded once and nested inside each other. Each sheet therefore carries four pages: two on the front, two on the back, and they are not consecutive. For an eight-page booklet, the outer sheet holds pages 8 and 1 on one side and 2 and 7 on the other. Printed in reading order the result is nonsense once folded, which is why imposition exists.

The rule

For a booklet of N pages, where N is a multiple of four, sheets pair up from the outside in. The first sheet carries N and 1 on its front and 2 and N-1 on its back. The next carries N-2 and 3, then 4 and N-3. Each subsequent sheet moves both counters inward by two until they meet in the middle. The final inner sheet holds the two centre pages side by side, which is the only place consecutive pages appear together.

Padding to a multiple of four

Because every sheet holds four pages, the total must be divisible by four. A 22-page document needs two blanks to reach 24. Convention places them at the end, though a document with distinct front matter sometimes takes one blank after the title page instead. Getting this wrong produces a final sheet with content on only part of it, which folds badly.

Printing it

Print double-sided with short-edge binding, not long-edge. Long-edge flipping, the usual default, rotates alternate sides and produces a booklet where every second page is upside down. This single setting accounts for most failed booklet prints.

Creep on thick booklets

Nested sheets push the inner pages outward as the fold thickens, so inner pages sit slightly further from the spine and their outer margins are trimmed more. Beyond roughly 40 pages this becomes visible, and professional imposition compensates by shifting inner pages inward. For short booklets it is negligible.