Print at actual size
Actual-size printing preserves the physical measurements in a layout PDF. The printer still needs to support the chosen sheet and the area used by the layout.
Before you print
Open the paper-layout PDF and confirm its page size and orientation. Load the same paper. A4 and Letter are different rectangles; choosing the nearest-looking format can cause reduction or clipping.
Check that the image and every repeated copy lie within the printable area supported by your device. The layout’s margins are your settings, not an automatic measurement of the printer.
Choose actual-size settings
In Acrobat, Actual size prints without scaling, while Fit scales the page to the printable area. Other viewers may label the equivalent choice 100% or use different wording. Review both the viewer and printer settings for additional scaling.
Use the layout PDF for a physical photo placement. The summary PDF is a report of dimensions and calculations; its text and example measurements do not make it a photograph at that physical scale.
- Match paper size and orientation to the layout PDF.
- Select Actual size or the equivalent 100% scale.
- Inspect the preview for clipped edges or unexpected extra pages.
- Print a first copy or calibration page.
- Measure the calibration mark and an image edge.
Measure the output
Use a physical ruler to check the 50 mm reference line between its end ticks. It should measure 50 mm. If it measures 48.5 mm, the output is 97% of the intended scale along that direction. Revisit the print settings before printing the photo pages.
Correct the print path rather than enlarging the photograph to compensate for an unexplained reduction. If the layout cannot fit at actual size, use a larger supported sheet or deliberately choose smaller image dimensions.
Print quality tips
Select paper and output settings according to the printer’s instructions. Examine a representative detail when sharpness matters, and remember that PPI does not guarantee focus, colour, or paper appearance.
The screen preview is not a physical ruler or a colour proof. Keep the original, save a measured layout that works, and check the first print before trimming a repeated grid or making further copies.