Calibration allows you to properly align the inkjet cartridge nozzles to the paper that you are printing. Without calibration, your print quality declines. Different printers have different on-screen controls for calibration, but you should be able to access them from the printer's  Properties  dialog box. 
 Calibrating Inkjet Printer...
                           
                           
                               Article Id:
                                10714
                               
                           
                           
                               Category: Troubleshooting Issues