Brother HL-3140CW User Manual page 75

Driver and Software
Advanced print settings
When you click the triangle mark (c) beside Advanced, the advanced print settings appear.
 Toner Save Mode
Conserve toner use with this feature. When you set Toner Save Mode to On, print appears lighter. The
default setting is Off.
NOTE
We do not recommend Toner Save Mode for printing Photo or greyscale images.
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