Canon iR6570 Manual page 108

G If you want to select a nonstandard paper size:
2
2-36 Paper Selection
❑
Press [Stack Bypass].
If you want to select the stack bypass when a paper size/type is already selected for the
current or reserved job, press [Stack Bypass Settings] to specify the desired paper size/type.
❑
Press [Free Size] © [Next].
❑
Select the desired paper type © press [OK].
If you are printing onto the back side of a previously printed sheet,
press [2nd Side of 2-Sided Page].