How to make a half-fold zine from a PDF

A half-fold zine is the simplest self-published booklet: print on landscape paper, fold the stack along the long axis, staple along the fold. This guide walks through the workflow using Zine Creator.

What you need

A PDF with the pages of your zine. Portrait-oriented source pages work best for the resulting booklet pages.
A printer. Auto-duplex is convenient but not required - any printer works if you're willing to flip the stack and feed it back through for the second side. See the printer guide for what to look for if you're picking one.
Paper in your sheet size (typically A4 or Letter). Weight and finish matter more than you'd think - the paper guide covers the tradeoffs.
A stapler that can reach the fold. A regular desktop stapler won't work - its throat is shorter than half the long edge of A4 / Letter, so the jaw can't reach the spine of a folded booklet. You need a long-arm, a 90-degree / swivel, or a dedicated saddle stapler; the tools guide covers the fold-alignment tradeoffs between them.
Optional but worth having: a bone folder for crisp creases and a paper trimmer or craft knife for flushing the open edge after folding - all in the tools guide.

Step 1: Prepare your PDF

The page count should be a multiple of 4 (every sheet holds 4 source pages). If it isn't, Zine Creator will pad with blank pages automatically, or you can enable Mirror Cover to use a flipped copy of page 1 as the back cover.

For a 16-page zine you'll print 4 sheets of paper double-sided. For 32 pages, 8 sheets. And so on.

Step 2: Upload and configure

Drop your PDF onto Zine Creator. Once it's read, the layout panel becomes active. Click Half-fold booklet.

In the studio:

Verify the page range covers what you want.
Set sheet size (A4 default; Letter common in the US).
Leave Scale to fit on unless your source already matches the half-sheet aspect ratio.
Set Margin to 5 mm or whatever your printer needs - many home printers can't print borderless.
Optional: enable Cut marks to mark the trim line, useful if you'll cut the outer edge after folding.

Step 3: Print

Download the imposed PDF. In your print dialog, set:

Orientation: Landscape.
Sides: Two-sided / duplex, if your printer supports it.
Binding edge: Long-edge (default in Zine Creator).
Scale: 100% or "Actual size". Do not let the dialog re-scale.

Long edge vs short edge

Edge-flip has nothing to do with where the spine lands - the spine of a half-fold booklet always runs down the long axis, regardless of this setting. It's purely about how the paper gets turned between side 1 and side 2, and therefore whether the back side needs to be pre-rotated 180° so the content comes out right-way-up.

Long-edge: paper flips around its long edge between sides (like turning a book page). Zine Creator's default. The back side is pre-rotated 180° in the imposed PDF to compensate.
Short-edge: paper flips around its short edge between sides (like flipping a calendar page). The back side is not rotated in the PDF.

For auto-duplex, set the printer driver to match Zine Creator's edge-flip setting (long by default). If your back pages come out upside-down after folding, the driver is interpreting "long" and "short" the opposite way from the spec - switch Zine Creator's edge-flip to Short edge, re-download, and try one sheet. Faster than fighting the driver.

For manual duplex, long-edge is usually the better choice. When you flip the stack to feed it back through for the second pass, flipping along the long edge means the same short edge of the paper still enters the printer first. The feed rollers grab the same edge twice, so the second side lands in the same position as the first. Flipping along the short edge swaps which edge feeds first, and any tolerance in the feed rollers shows up as a left-right shift between the two sides - small but visible at the fold.

Manual duplex (no auto-duplex printer)

If your printer can't do automatic duplex, the workflow is:

Print only the odd output pages first ("Odd pages only" in most print dialogs).
Take the stack out of the output tray. Flip it along the long edge - front becomes back, top becomes bottom.
Put the stack back into the input tray. Test with one sheet before committing the whole job.
Print the even pages. If your printer outputs face-up, print them in reverse order so the stack ends up correctly collated.

Many drivers have a "manual duplex" mode that prompts you to flip at the right moment. The printer-settings guide has more detail on troubleshooting upside-down or out-of-order pages.

Step 4: Assemble

Two ways to fold, depending on what's on the pages:

Fold each sheet individually, then nest them in order with sheet 1 on the outside. Recommended for graphic-heavy zines: each sheet can be folded precisely on its own centerline, so full-bleed images line up edge to edge across the spine. Stacking and folding the whole pile at once pushes inner sheets outward (the same "creep" you trim later) and the fold drifts off the centerline by a millimetre or two on the inner sheets - invisible with text, very visible with graphics.
Stack and fold the whole pile at once: faster, fine for thin text-heavy zines where small fold drift won't show.

Either way, a bone folder makes the crease noticeably crisper than thumb-pressure alone, and pre-folding also helps with stapler alignment (the tools guide covers why).

Fold the sheets (individually or as a stack, per above).
Nest them in order with sheet 1 on the outside.
Staple along the fold. Two staples evenly spaced is the standard "saddle stitch" - see the tools guide for the tradeoffs between stapler styles.
Optional: trim the open edge with a paper trimmer or a craft knife against a steel-edged ruler. Nested sheets cause slight "creep" - the inner pages stick out a hair, and trimming flush makes the booklet feel finished.

That's the entire workflow. The paper, printer, and tools guides cover the longer-form tradeoffs; printer settings covers troubleshooting upside-down back pages and borderless drift.