Canon imagePROGRAF iPF510 User Manual page 512

Printer Driver
Setting Item
N
Economy Printing
L
Printer
498 Mac OS X Software
When this mode is selected, less ink is consumed than in regular
printing, but the quality is diminished.
Select this mode if you want to conserve ink when checking
drawings, for example. Depending on the Media Type and Print
Quality settings, this mode may not be available.
Click to display the Printer dialog box, which indicates the ink levels
and gives other information about the printer.
Description