Skip to main content
I/O Checkup
System ready
Active lab / 10Printer LabPrintable color, alignment, nozzle, resolution, margin, duplex, photo, and code diagnostics.
PRINTER LAB / PRN.07

Margins and Paper-Size Test

Nested borders, corner targets, center axes, millimeter references, and a 50 mm scale bar reveal clipping, unexpected enlargement, centering, and paper mismatch.

LIVE PRINT PREVIEWA4 · Portrait · 1 page · screen preview 68%
READY
I/O CHECKUP / PRN.07

Margins and paper-size test

PAPER
A4
ORIENTATION
Portrait
PAGE
1
3 mm reference
5 mm reference
10 mm safe area
15 mm content area
PHYSICAL CENTER — X AXIS
Y AXIS
A4 / PortraitExpected: 210 × 297 mm
50 mm scale referenceMeasure between the outside marks. Correct result: 50 mm.
TLTRBLBR
iocheckup.comPrint at 100% / Actual size unless the tool instructions say otherwise.PRN.07
WHY THIS SHEET EXISTS

Margins and paper-size test: a controlled physical comparison

Use it when forms shift, labels miss their cells, borders clip, printouts are reduced, or an A4 document is being sent to Letter paper (or vice versa).

01 / INSPECT

What to inspect on paper

  • The selected paper label matches the sheet loaded in the tray and print dialog.
  • The 50 mm scale bar measures 50 mm with a physical ruler.
  • Corresponding left/right and top/bottom frames are equally visible.
  • Corner arrows point to complete, unclipped reference marks.
02 / HEALTHY OUTPUT

What a clean result looks like

  • The center axes cross at the physical page center.
  • The safe-area border prints completely.
  • Any non-printable margin is consistent with the printer specification.
03 / LIMITS

What the result does not prove

  • Most printers cannot print to the literal paper edge unless borderless mode is supported.
  • Fit, Shrink, borderless expansion, and driver scaling alter measurements.
  • A browser cannot read the actual tray or paper loaded.
HONEST BROWSER BOUNDARY

The sheet is the diagnostic instrument.

I/O Checkup prepares the controlled pattern and opens the browser print dialog. A webpage cannot reliably read your printer model, queue, driver faults, ink or toner level, maintenance state, or mechanical condition. Diagnose those systems with the printer manufacturer’s utility after the physical sheet shows a repeatable symptom.