Canon MF8580Cdw Manual page 522

Y dimension
Specify the vertical dimension (long edge) of the custom paper.
127 to 355 (mm)
Append CR to LF
Select whether to append a carriage return (CR) when the machine receives a line feed code (LF). If <Yes> is selected, the print
position moves to the beginning of the next line when the machine receives an LF code. If <No> is selected, the print position moves
to the next line, just under the received LF code.
Yes
No
Enlarge A4 Print Width
Select whether to expand the width of the printable area of A4 size paper in portrait orientation to that of LTR size.
Off
On
Halftones
Specify the data processing method to reproduce halftones. You can select whether to use <Error Diffusion>, and you can also select
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<Printer Settings> <PCL>
<Printer Settings> <PCL>
<Printer Settings> <PCL>
<Y dimension> Specify the dimension
<Append CR to LF> Select <Yes> or <No>
<Enlarge A4 Print Width>
<Apply>
Select <Off> or <On>