Dell 3115cn Color Laser Printer - Manual (Page 577)

-Sc=mode
Specifies screen.
Available screens are as follows:
0
Fineness
1
Gradation
2
Auto
3
For Transparency
-Gg=mode
Specifies gray guaranteed.
Available gray guaranteed options are as follows:
on
On
off
Off
This option is available only for color printing.
-Ct
Specifies color transformation.
This option is available only for color printing.
-Br=mode
Specifies brightness adjustment.
Available brightness adjustment option value are as follows:
+5
Bright 5
+4
Bright 4