MX-PEX1 (serv.man10). Fiery PEX1 Print Options Guide - Sharp Copying Equipment User Guide / Operation Manual. Page 20

 Choose this setting to print a job so that the data on the first page is duplicated 

on the first sheet. The next sheet duplicates the data on the second page, and so forth. For 
example, when each of the printed copies is cut in half, the result is two complete sets of the 
same document.  

 Choose this setting to speed print a job so that when the sheets are stacked and 

cut from the central position, the job is numbered in order and separated as two stacks. The 
order of print is such that when they are cut in half, they can be combined to form a single 
complete set of the document, in faster printing time.

Use this option to specify how to position the image on the page.

Refer to the following table when you use the Centering Adjustment option: 

Positions the image in the center of the page.

Positions the image flush with the bottom of the page.