Sharp MX-7090N User Manual page 344

PRINTER►FREQUENTLY USED FUNCTIONS
Fold stapling
Create document data of a suitable size in the application, or use the
Fit to Page function, to eliminate the top and bottom margins.
The margins on the sides are eliminated, and Edge-to -Edge printing
is completed.
With normal printing...
Margins appear on the top, bottom, and sides
Original
Margins appear on the sides
Margins
3-32
Paper
(11''x17''/ A3)
Fold position
Trim the sides