Saddle Stitch Position Adjustment
If you are using the Saddle Stitch mode of the Booklet Finisher-M1, and you notice that the folds of the paper are not exactly in the middle of the booklet, you can make adjustments to the saddle stitch position to compensate for this error.
You can make adjustments to the folding position and stapling position at the same time.
This mode can be set when the Booklet Finisher-M1 is attached. (See "Staple Finisher-M1/Booklet Finisher-M1.")
1.
Press 
(Settings/Registration).
(Settings/Registration).2.
Press [Adjustment/Maintenance] → [Adjust Action] → [Change Fold/Stitch Position].
3.
Select the paper size to change → adjust the saddle stitch position by pressing 
or 
→ press [OK].
or → press [OK].