Canon LBP7780CX User Manual page 616

[Advanced
Smoothing]: [Off],
[Smooth 1], [Smooth
[Advanced
2]
Smoothing]
[Graphics]
[On]
[Text]
[Grayscale [sRGB], [NTSC],
*
[Uniform RGB]
Conversion]
Specify whether to use the smoothing process to smooth the edges
of graphics (illustrations created in other applications) or text.
[Smooth 1] is better than [Smooth 2] for performing a smoothing
process that provides more smoothing.
*
: [Off],
You can select what to smooth by switching [Graphics] and [Text]:
[On]/[Off].
*
: [Off], [On]
Select the method for converting color print data to grayscale for
printing.
When it is set to [sRGB], it calculates the grayscale value using
the sRGB standard color conversion method.
When it is set to [NTSC], it calculates the grayscale value using
the NTSC standard color conversion method.
When it is set to [Uniform RGB], it takes the average value of
the Red, Green and Blue color values as the grayscale value.
setting for this item becomes invalid.
If [Color Mode] is set as [Auto (Color/Black)] and [Color], the
setting for this item becomes invalid.