Canon MF419x User Manual page 310

Color data is converted to monochrome so that R, G, and B are uniformly converted to the same gray level.
7
Press .
➠
Printing starts.
● If you want to cancel printing, tap <Cancel>
8
Disconnect the USB memory device from the USB port.
1
Press .
2
Press .
3
Tap <Device Status>.
4
Tap <Remove Memory Media>.
➠
Wait until the message <The memory media can be safely removed.> is displayed.
5
Disconnect the USB memory device.
● If you always want to print with the same settings:
Settings(P. 302)
LINKS
Memory Media Print Settings(P. 674)
Using the Machine as a Printer
<Yes>
Changing Default Memory Media Print
301