PDF Printing Problems: Margins, Scaling and Shifted Pages
The promise of PDF is that it looks the same everywhere, and on screen that holds. On paper one more variable appears: the strip along the edge that a printer physically cannot print on.
Printers cannot print to the edge
Almost every printer grips the paper along a strip it therefore cannot lay ink on — typically 3 to 5 millimetres. This is the non-printable area.
When the PDF page is the same size as the paper and content runs to the edge, the printer does one of two things: it shrinks the content so everything fits the printable area, or it clips the edges. Both change how the document looks.
What "fit to page" does
| Setting | Effect | When to use |
|---|---|---|
| Actual size (100%) | No scaling, may clip edges | Scaled drawings, forms, official documents |
| Fit to page | Usually shrinks to 94–97% | Designs that bleed to the edge |
| Fit to printable area | Guarantees a margin | When everything must be visible |
| Custom scale | You set it | When a specific ratio is required |
"Fit to page" looks like the safe default and for most documents it is. But it must not be used for scaled drawings, designs with cut marks, or forms where physical dimensions matter: a technical drawing shrunk to 96% is no longer to scale.
Paper size mismatch
A4 (210×297 mm) and Letter (216×279 mm) are close but not equal. Printing an A4 document on Letter clips roughly 18 mm from the bottom; the other way round loses 6 mm from the sides.
This is the most common printing problem in internationally shared documents and it is invisible on screen. If a document is going to another country, generous margins beat any setting applied later.
Four checks before printing
- Look at print preview. The driver's preview is more accurate than the PDF viewer's.
- Confirm the page size. Is the document A4, and is the paper A4?
- Choose the scaling deliberately. Do not leave it on the default.
- Print page one alone. Spending one sheet before committing eighty is cheap.
Common symptoms
| Symptom | Cause | Fix |
|---|---|---|
| Page numbers clipped | Content in the non-printable area | Fit to printable area |
| Everything slightly small | Fit to page is on | Switch to actual size |
| Last line missing | A4 document, Letter paper | Match the paper size |
| Page prints sideways | Conflicting orientation setting | Rotate the page |
Double-sided printing
With an odd page count the back of the last sheet stays blank — that is normal. What actually needs attention is the binding edge: flipping on the long edge opens like a book, flipping on the short edge like a notepad. The wrong choice prints every reverse side upside down.
If the page order is already wrong, fixing the order before printing is far simpler than fighting the printer settings.
Frequently asked questions
Why are the edges clipped when printing?
Printers grip the paper along a 3–5 millimetre strip they cannot print on. If content runs to the edge, the printer either shrinks it or clips it.
Should I use "fit to page"?
For most documents, yes — it is the safe default. Do not use it for scaled drawings, designs with cut marks, or forms where physical dimensions matter; a drawing shrunk to 96% is no longer to scale.
What happens printing A4 on Letter?
About 18 millimetres is clipped from the bottom. The other way round loses 6 millimetres from the sides. It is invisible on screen and common in internationally shared documents.
How should I print a document to be signed?
At actual size, 100%. A scaled form comes back from the scanner with shifted field positions and automated systems may reject it.
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