Trimming
You can specify trimming locations for magazine-style (center) binding and perfect binding.
The center cutting for the [Mini book double], [Magazine double], [Speed], and [Double] printing methods cannot be performed with this function.
These settings are specified on the [Paper/Imposition/Finishing] screen.
Note that this explanation outlines the finishing settings. For details about a specific setting, see the on-screen balloon help that appears when you click the 
button.
For magazine style binding (center binding)
You can trim the opening end of a bound document. (A trimmer must be installed on the printer.)
For perfect binding
You can trim the top, bottom, and opening end of a bound document. (A perfect binding unit must be installed on the printer.)
For details about compatible paper sizes and thicknesses etc., see the documentation of your printer, trimmer, and perfect binding unit.
