Split Spreads: Covers, Skips and Booklet Order

Splitting a spread is a geometry job with a few exceptions. Covers and single pages should stay whole, an off-centre fold needs a ratio, and a booklet scan needs re-pagination before the halves make sense.

Why this comes up

Books and bound documents are rarely uniform: the cover is a single page, the title page may be single too, and a booklet scan arrives in an order no reader would recognise. Treating every sheet as a spread produces two half-covers and a scrambled sequence.

Check before you run it

• Review which pages stay whole. Automatic detection is on by default and leaves single pages uncut, including covers and title pages. Name any further pages that must stay whole in the exclusion field.
• Set the ratio when the fold is off-centre. A ratio of 1 cuts down the middle; 2 leaves part one twice as big as part two. Measure from the scan rather than nudging until it looks right.
• Re-paginate only for a booklet scan. If the scan arrived as 12, 1, 2, 11 and so on, re-pagination turns it into 1, 2, 3, 4 before the split. A normal left-to-right stack should leave the option off.

When to reach for it

• A right-to-left book was photographed as spreads. Turn on the right-to-left option so the halves are resequenced in the book's reading direction.
• A stapled booklet was scanned in imposed order. Re-pagination restores reading order before each spread is cut into two pages.

One question we get

When do I need a vertical split?

Scanned two-page spreads: each sheet holds a left and a right page. Split down the middle and the halves are resequenced into single pages in reading order.

Where it fits

The tools people usually open next to Split in half:

• Merge PDF — Combine multiple PDFs and images into one document.
• Resize — Change PDF page size and add margins/padding.
• Organize PDF — Arrange, rotate, duplicate, delete or insert PDF pages.

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