Canon iR6570 Manual page 274

G If you want to set the same width for all four borders:
G If you want to set the top, left, right, and bottom widths independently:
4
4-56 Frame Erase
❑
Press [-] or [+] to set the frame erase width © press [Next].
❑
Press [Adjust Each Dim.].
❑
Select the desired frame erase borders © press [-] or [+] to set their respective frame erase
widths © press [Next].
To return to the screen for setting the same width for all four borders,
press [Adjust All At Once].