Canon NP6012 Service Manual page 227

MB INSTALLATION
B. Setting Copy Paper
Adjust the paper width and length guides
inside the cassette to suit the size of copy
paper.
1) Slide out the cassette from the copier.
2) Move the paper length guide inside the
cassette to suit the length of the copy
paper to be used.
Figure 5-201
3) Move the paper width guide inside the
cassette to suit the width of the copy
paper to be used.
Figure 5-202