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Joe B.

Reviewed for technical accuracy

Specialities: PDF printing issues (cut off, clipped margins, scaling problems), printer driver and tray-size checks, Windows & macOS print dialogs.

What to check first (safely): paper size, scaling, and print preview before changing anything

Technician avatar Technician
I can help you check this in a safe way. When a PDF prints with the sides or bottom missing, it’s often not a “broken printer” — it’s usually a paper size or scaling mismatch between the file, the app, and the printer settings.

Before we change anything, let’s pinpoint the pattern. Which edge is missing most — right side, left side, top, or bottom? And did this start today, or has it happened for a while?
Customer
It started today. The bottom of the page is missing, like the last line is chopped off. It’s a PDF from email.
Technician avatar Technician
Thanks — “from email” is a helpful clue. PDFs printed from different apps (Mail, Chrome, Adobe Reader, Preview) can behave differently.

A quick, safe question: are you on Windows or a Mac? And what printer brand/model (HP, Brother, Canon, Epson, etc.)?
Customer
Windows 11 laptop. Printer is Brother. It prints fine for regular documents, but this PDF is missing the bottom part.
Technician avatar Technician
That’s a classic “looks scary, but it’s usually a setting” situation — and I don’t want you to try anything that could make it worse, like changing driver defaults or doing resets.

Let’s start with the safest checks first:
• In the print preview, does the page look fine, or does it already look cropped there?
• In the print window, do you see options like Actual size, Fit, Shrink to printable area, or Scale?
Customer
The preview looks mostly okay, but it’s hard to tell. I see “Fit to page” and something about scaling. I didn’t change it though.
Technician avatar Technician
You may not have changed anything — sometimes an update or a different app changes the default. This is common after Windows updates, but we should rule out risks before you chase printer settings.

One important check: what paper is physically in the tray — Letter or A4? (They’re very close, but that small difference can cut off the bottom.)
Customer
I’m in Europe, so it’s A4 paper.
Technician avatar Technician
Perfect — then the next safe question is what the computer thinks it’s printing on. Many PDFs are created in “US Letter,” and if the print dialog or the printer driver is set to Letter while your tray is A4 (or the other way around), the bottom line can get clipped.

In the print window, do you see a setting that says Paper size or Page size? What does it show right now?
Customer
It says Letter. I didn’t notice that. Should I change it to A4?
Technician avatar Technician
That’s a very good catch. Changing the paper size in the print dialog is usually a safe adjustment because it doesn’t “reprogram” the printer — it just tells the job what paper you’re using.

Before you do it, one gentle check: is the PDF itself designed for Letter? Some PDFs have content very close to the edge, and printers have a non-printable margin. If the PDF already pushes the bottom edge, the last line can disappear unless it’s scaled slightly.
Customer
It’s a form. The text is pretty close to the bottom. I’m worried it will mess up the formatting if it scales.
Technician avatar Technician
That’s a smart concern, especially with forms. Let’s keep this low-risk: we’re not trying to “shrink everything,” just prevent edge loss.

Two safe things to look for (wording varies by app):
• Shrink oversized pages or Shrink to printable area
• A scale setting that’s close to 95–99% rather than 100% when content is near the edge

Which app are you printing from right now — Chrome/Edge, Adobe Acrobat Reader, or something else?
Customer
I’m printing from the browser. I opened the PDF in Chrome.
Technician avatar Technician
Got it. Browser printing can be a little “helpful” in ways that cause surprises, especially with margins and scaling.

Let’s do a non-destructive comparison check: if you download the PDF and open it in Adobe Acrobat Reader (not the browser), does the print preview look different? We’re not changing the file — we’re just comparing how the print engines render it.

I’m suggesting this because I don’t want you digging into Brother driver tabs unless we’re sure the app is the cause.
Customer
I do have Adobe Reader. The preview there shows more margin. In Chrome it looks tighter.
Technician avatar Technician
That difference is meaningful. It points to a rendering/scaling mismatch rather than a hardware issue.

Another safe check: in Adobe’s print window, is it set to Fit or Actual size? And do you see anything about Choose paper source by PDF page size (sometimes it’s a checkbox)? That option can pick a different size than what’s in the tray.
Customer
It says “Fit” and there is a checkbox about choosing paper source by PDF size. It’s checked.
Technician avatar Technician
That checkbox can definitely be involved. If the PDF is tagged as Letter, it may try to “helpfully” choose a different page size than your A4 tray, and then you end up with edge loss or a clipped bottom.

We don’t need to guess wildly. The safest diagnostic approach is:
• confirm the print dialog paper size matches the tray (A4 for you)
• confirm scaling isn’t forcing 100% when the PDF has tight margins
• avoid changing driver defaults unless a single job setting proves the pattern

One last check: does the cut-off happen on every PDF, or only this one form?
Customer
It seems like mostly this one form. Other PDFs printed before, but I haven’t tried many today.
Technician avatar Technician
That strongly suggests the file layout is right on the edge of what printers can physically print. Most home/office printers cannot print all the way to the edge, even when the page looks full on screen.

If you want to keep it safe: don’t change printer firmware settings, and don’t “reset” anything. Focus on print preview, paper size matching (A4 vs Letter), and a gentle scale adjustment that preserves the form content.
Customer
That makes sense. I was afraid the printer was dying. So it’s more about the way the PDF is set up and the size mismatch?
Technician avatar Technician
Exactly — and you approached it the right way by checking before making big changes. If it started suddenly, it’s often an app default, a paper-size assumption (Letter vs A4), or a print preview setting that changed after an update.

If you try one small, reversible test (same PDF, different app or different scaling option) and the bottom line appears, that confirms the cause without touching anything risky.

Quick answer: the accepted fix

Accepted fix for My PDF prints cut off on the edges — what do I check first? is usually about alignment between the PDF, the app, and the selected paper size. Safe checks that commonly resolve missing lines or clipped margins include:
• Confirm the print dialog paper size matches the tray (A4 vs Letter).
• Use print preview to compare Fit vs Actual size (and look for “shrink to printable area” options).
• Try the same PDF from a different viewer (browser vs Adobe Reader vs system viewer) to rule out rendering differences.
• Avoid changing printer default settings until you confirm whether it’s only one file or all PDFs.

Common reasons a PDF prints with missing edges (and why it can start suddenly)

When parts of a PDF page don’t show on paper, it’s usually one of these: a paper size mismatch (A4 vs Letter), a scaling option that keeps the content too close to the border, or the PDF itself being designed with very tight margins.

This can begin “out of nowhere” if you switch how you open the PDF (browser vs Adobe Reader), install a Windows update, or the printer driver changes its default paper size. That’s why it’s worth comparing print previews before adjusting deeper settings.

Safe checks before changing printer defaults: paper size, margins, and viewer differences

Start by confirming what paper is in the tray and what the print dialog is set to. Then look at print preview for any sign the page is being cropped before it even reaches the printer.

If the PDF prints fine from one app but not another, the printer is usually fine. That points to a viewer or print-engine setting (scaling, “choose paper source by PDF page size,” or margin handling) rather than a hardware fault.

PDF getting clipped? Start with paper size and print preview

Start with low-risk checks and avoid resets until you know the cause.

Look for paper size mismatches (A4 vs Letter), check print preview for cropping, and compare printing from a browser versus a dedicated PDF viewer. If you must change something, prefer per-print “scaling” options over permanent printer defaults.

Disclaimer: This information is AI-generated and intended for general guidance only. For advice specific to your printer model and home/office setup, please consult a verified expert on Whizz-Tech before changing system settings.

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FAQ

Why did my PDF start printing cut off all of a sudden?

This often happens after an update, a driver change, or opening the PDF in a different app than usual. Browser printing and PDF viewers can apply different scaling or margins. The fastest way to confirm is to compare print preview in two different viewers.

Is this a paper size issue (A4 vs Letter) or a printer problem?

Very often it’s paper size. A4 and Letter are close, but that small difference can remove the last line at the bottom. Check that the tray size and the print dialog page size match.

Which print setting usually prevents missing edges without changing the layout too much?

Look for options like “shrink to printable area” or a gentle “fit” setting. These can keep content inside the printer’s printable margins. It’s best to test per print job before changing any default driver settings.

Can I check this safely at home without resetting the printer?

Yes. You can review print preview, confirm paper size, and try printing the same PDF from another viewer. These checks are reversible and don’t require resets. If only one PDF is affected, the file layout is likely the main factor.

Sources

Filed under: Printer won’t print

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