Specify the size of the finished bound booklets to determine the position where you want to cut the fore edge.
Press [Cut Fore Edge].
Press [Specify Finishing Size].
Enter the required finishing size using the number keys, and then press [].
You can adjust the finishing size from 139.7 to 216.0 mm (5.50 to 8.50 inches) in 0.1 mm (0.01 inches) increments.
For details about how to perfect bind, see Perfect Binding.