Canon S400 Reference Manual page 168

Check 1
Is Print Quality on the Quality tab set to Fast?
Set Print Quality to Fine and print again. This reduces uneven coloration
you may see in a document where a large amount of ink is used.
Windows
1
Open the Printer Properties dialogue box.
2
Click the Advanced button in the Main tab.
3
In the Quality tab, drag the slide bar to the right toward Fine and click the
OK button.
Macintosh
1
When using Manual for printing, click the Details button in the Print dia-
logue box.
2
In the Quality panel, drag the slide bar to the right toward Fine.
Troubleshooting - Printout is Unsatisfactory
Colours streaked or uneven
168