The printer will normally perform an alignment automatically whenever any printhead is replaced. However, you can turn Off this automatic alignment by choosing the printer icon, then Internal RIP Setting > Align Calibration > Off.

You can also request a Printhead Alignment from the front panel at any time by choosing the printer icon, then Utilities > Calibrations > Printhead Alignment. In this case the printer will align the printheads immediately; or, if an image is being printed, as soon as the current print job is finished. The alignment procedure requires a minimum paper size of A1/D-size (24 inches).

You should also perform the Printhead Alignment if the Image Quality Print indicates an alignment error.