MX-PEX1 (serv.man10). Fiery PEX1 Print Options Guide - Sharp Copying Equipment User Guide / Operation Manual. Page 19

The following sections provide additional information about print options. For more 
information about the settings, requirements, and constraints in effect for these options, 
see the table on 

Use this option to arrange the pages of the print job in special layouts for folding or cutting 
after printing.

Custom Paper Sizes are not supported when creating a booklet.

 The job is printed without any booklet imposition features.

 Choose this setting to print entire documents that are folded and stacked in booklet 

order. Finished pages can be stapled or stitched across the center fold, or spine.

You can also use Creep to adjust the image shifting that may occur when you print booklet 
jobs. For more information, see 

 This option is the same as Saddle, except that the page order sequence 

is from right to left.

 Choose this setting to print separate folded pages that are stacked in booklet order. 

Finished pages are stitched adjacent to one another for trimming or gluing.

 This option is the same as Perfect, except that the page order 

sequence is from right to left.