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I/O Checkup
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Active lab / 10Printer LabPrintable color, alignment, nozzle, resolution, margin, duplex, photo, and code diagnostics.
PRINTER LAB / PRN.04

Printer Alignment Test

Crosshairs, concentric targets, parallel rules, bidirectional ladders, rulers, and registration marks expose skew, carriage offset, and page-centering errors.

LIVE PRINT PREVIEWA4 · Portrait · 1 page · screen preview 68%
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I/O CHECKUP / PRN.04

Alignment test

PAPER
A4
ORIENTATION
Portrait
PAGE
1
TOP LEFT
TOP RIGHT
L1

Bidirectional line ladders

CENTER / 0
L2

CMYK registration overlay

BOTTOM LEFT
BOTTOM RIGHT
iocheckup.comPrint at 100% / Actual size unless the tool instructions say otherwise.PRN.04
WHY THIS SHEET EXISTS

Alignment test: a controlled physical comparison

Use it when vertical lines look doubled, tables drift, borders are tilted, colors show fringes, or front-edge and rear-edge spacing differ.

01 / INSPECT

What to inspect on paper

  • The center crosshair meets at one sharp point.
  • Horizontal and vertical ladders stay parallel and evenly spaced.
  • Colored registration crosses sit directly beneath the black cross.
  • Outer rulers are parallel to the paper edges.
02 / HEALTHY OUTPUT

What a clean result looks like

  • No consistent left/right shadow appears beside thin rules.
  • Concentric rings remain round and share one center.
  • The page is centered within the printer’s normal non-printable margins.
03 / LIMITS

What the result does not prove

  • Physical feed skew and printhead alignment can produce different signatures.
  • A rotated scan or photo is not reliable evidence of printer skew.
  • Borderless expansion can intentionally crop or enlarge the pattern.
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.