Dell 5130cdn Color Laser Printer - Manuel (Page 305)

This option is available only for color printing and when entry data is RGB data.
-Sc=mode
Specifies screen.
Available screens are as follows:
0
Fineness
1
Standard
2
Auto
3
Gradation
-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 values are as follows:
+5
Bright 5
+4
Bright 4
+3
Bright 3
+2
Bright 2
+1
Bright 1
+0
Normal
-1
Dark 1
-2
Dark 2
-3
Dark 3