Guide · reviewed November 14, 2026
Align double-sided bookmarks before printing a batch
Use the uncorrected test, measure the back-side offset, and apply one small correction.
Open Home Print Alignment →Check paper size and scaling
Use the same paper size in this tool, the PDF viewer and the printer driver. Print the duplex test at Actual size or 100%. Measure its 50 mm line. Scaling errors move different parts of the sheet by different amounts, so a simple X/Y correction cannot fix them. Resolve scaling before attempting registration.
Measure in one consistent view
Hold the test to a light and view the BACK with its TOP label upright. Compare each numbered back cross to the corresponding front cross visible through the paper. If the back marks sit 2 mm to the right, enter -2 in Move back right. If they sit 1 mm lower, enter -1 in Move back down. These are corrections in the back page’s own viewing direction.
Confirm with actual artwork
Download one sheet of your intended artwork and print it using the same duplex setting as the test. Check cut positions and orientation before printing the full quantity. If one edge aligns but the opposite edge does not, the issue may be skew, stretch or scaling rather than a uniform offset. Printer mechanics and paper handling vary; the tool records a measured correction but cannot guarantee registration.