Canon S900 - Manual (Page 125)

Print Quality is Poor or Contains Errors 125
Troubleshooting
■ In the printer driver settings, select a higher print quality setting.
Windows
1
Open the Printer Properties dialog box.
2
Click the Main tab, then click High for the Print Quality setting.
Macintosh
1
Open the Print dialog box.
2
For Print Mode, select Manual, then click Details.
3
Click the Quality icon, then drag the Print Quality slider to the Fine end.