From the control panel, navigate to Settings > Device > Maintenance > Configuration Menu > Scanner Configuration > Scanner Manual Registration.
In the Print Quick Test menu, select Start.
Place the test page on the scanner glass, and then select Flatbed Registration.
In the Copy Quick Test menu, select Start.
Compare the test page with the original document.
Note: If the margins of the test page are different from the original document, then adjust the Left Margin and Top Margin settings.
Repeat step 4 and step 5 until the margins of the Copy Quick Test page closely match the original document.