A PDF looks perfect on screen. You print it, and the page comes out shrunk with wide margins, or the edges are cut off, or the content sits in one corner. These problems almost always come down to a mismatch between the PDF's page size, your paper, and the printer's scaling settings.
Cause 1: Page size and paper size do not match
The most common cause. A PDF made for US Letter (8.5 by 11 inches) printed on A4 paper, or the other way round, will be scaled or cropped. The two sizes are close but not the same: A4 is narrower and taller.
Fix: in the print dialog, choose Fit or Shrink oversized pages so the content scales to your paper. To check the PDF's page size, look at its document properties.
Cause 2: Scaling set to "Actual size" or a fixed percentage
If the print dialog is set to Actual size or 100%, and the page is larger than the printable area, edges get cut off. If it is set to a small percentage from a previous job, everything prints tiny.
Fix: set scaling to Fit (or Fit to printable area) for most documents. Use Actual size only when exact dimensions matter, such as a form, a ruler or a label sheet, and make sure the paper size matches.
Cause 3: Printer margins
Most home and office printers cannot print right to the edge of the paper. Content placed in the outer few millimetres is lost. Fix: use Fit so the page scales inside the printable area, or ask whoever made the PDF for a version with wider margins.
Cause 4: The PDF has large white margins or a wrong crop box
Some PDFs, especially those exported from slides or web pages, contain a lot of empty space around the content, so the content prints small even at full page size. Fix: crop the PDF to the content before printing. See how to crop a PDF.
Cause 5: Mixed page sizes in one file
A PDF combined from several sources may contain pages of different sizes. Some print fine, others are shrunk or cut. Fix: choose Choose paper source by PDF page size if your printer supports it, or use Fit for the whole job. See how to change PDF page size if you need to standardise.
Cause 6: Landscape pages printed portrait
A landscape page printed in portrait orientation is shrunk to fit the narrow width. Fix: turn on Auto-rotate and center or set orientation to Auto. If a page is stored sideways, rotate it in the PDF first; see how to rotate a PDF page.
Cause 7: Browser viewers and different defaults
Printing the same PDF from a browser viewer and from a desktop PDF app can give different results, because each has its own default scaling. If one gives the wrong size, try the other, and check the scaling setting each time.
Quick checklist
- Check the PDF's page size against your paper.
- Set scaling to Fit.
- Set orientation to Auto.
- Print a single test page before a long job.
If pages print blank or with missing text rather than the wrong size, see PDF printing blank fixes.
Takeaway
Most size problems come from a Letter versus A4 mismatch or a leftover scaling setting. Set scaling to Fit, match orientation automatically, crop excess margins, and print one test page first.
