Adjusting the Finish of Book Spread Printing
Overview
Adjust the widths of the gutters (page spacing) on book spread pages.
Adjusting the Gutter (Binding)
If the images on a book spread are displaced due to the position of the gutter, measure the size of the deviation using a ruler or something similar, and adjust using the printer driver function.
Page spacing adjustment ([Layout])
When Using Staple
As well as being able to adjust the 2 staple positions of the stapling using the system’s Touch panel, you can also make adjustments if the stapled paper is not properly aligned.
Adjusting the spacing of the staples ([Staple Position Adjustment])
Adjusting the staple paper width ([Staple Paper Width Adj.])
in the upper-right of a page, it turns into 
and is registered as a bookmark.