Adjusting the Trimming Width
If the optional trimmer is installed, you can trim the edge of booklets. This setting enables you to adjust the trimming width.
1
Press 
(Settings/Registration) 
<Adjustment/Maintenance> <Adjust Action> <Adjust Trim Width>.
(Settings/Registration) <Adjustment/Maintenance> <Adjust Action> <Adjust Trim Width>.2
Adjust the trimming width.
3
Press <OK>.