Sindoh N700 - Manual (Page 172)

Printer Features
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3. [Halftoning]
Halftoning feature is in the PCL5e Driver of PDL only.
The types of Halftoning are “Standard”, “Coarse”, “Line Art”and “None”.
4. [Gray Correction]
Gray Correction can be used in the PCL5e/6 Driver of PDL only. It can adjust the brightness
and contrast of print job. The brightness and contrast can be adjusted by your settings.
The default is brightness (10) and contrast (-35):
5. [Toner Save]
You can reduce the toner amount used in printing.