Canon MF419x User Manual page 704

Grayscale Conversion
You can select ways to convert color values to a grayscale value when you print color print data.
sRGB
NTSC
Uniform RGB
● This section describes the settings to convert the color data into grayscale data.
● This setting is invalid for black-and-white data.
<Menu>
PDF
You can change settings for PDF files.
Enlarge/Reduce to Fit Paper Size
Specify whether to print in an enlarged/reduced size to fit to the
that size enlargement/reduction will not affect the aspect ratio of the document.
Off
On
<Menu>
<On>
Enlarge Print Area
Specify whether to enlarge the
Off
On
<Menu>
Setting Menu List
<Printer Settings> <PS>
<Printer Settings> <PDF>
Printable Area(P. 860) as much as the paper size permits.
<Printer Settings> <PDF>
<Grayscale Conversion>
Printable Area(P. 860) of the paper. Note
<Enlarge/Reduce to Fit Paper Size>
<Enlarge Print Area>
695
Specify the grayscale conversion
Select <Off> or
Select <Off> or <On>