HP Deskjet 1012 Printer - Manual (Page 43)

c. In the printer software, click Print and then click Maintain Your Printer to access the printer
toolbox.
d. Click Print Diagnostic Information on the Device Reports tab to print a diagnostics page.
e. Review the blue, magenta, yellow, and black boxes on the diagnostics page.
6. Clean the ink cartridges automatically, if the diagnostic page shows steaks or missing portions of
the color and black boxes.
ENWW Improve print quality 39