Ability to select 3x4" paper & 2 pages on template editor

I’m using the DNP RX1HS printer with their 3×4” perforated paper. Currently there is no option to select 1× 3×4” paper & print 2 pages so it duplicates it to the printer but not to fotoshare. Exactly how 2×6” prints are setup in the template editor. I’d like to only see 1× 3×4” print in the fotoshare gallery instead of the 4×6” print with the duplicate print.