Canon imageRUNNER C3125i User Manual page 780

➠
select <Top Left>
● Stapling at the top left of paper in portrait orientation
When Placing A4-, A5-size Originals
Feeder
➠
select <Top Left>
When Placing A3-size Originals
Feeder
➠
select <Bottom Left>
● Stapling at the top right of paper in portrait orientation
When Placing A4-, A5-size Originals
Appendix
Platen glass
Platen glass
771