Stylus Pro 4880 Field Repair Guide 1/17/08
Print Head Slant Adjustment (CR) Printer Component, Software Item, LCD Display, Printer Button  Page 173.
8. Adjust, and reprint, until the alignment pattern is correct.
9. Tighten the 4 Screws, and reprint the pattern to verify that the pattern is still correct.
10. Re-install the Carriage Cover.