Excel, like most other programs, is rather ignorant of the printer
capabilities. They simply spit out pages and depend on the printer drivers
to handle whether the sheets are printed on separate pieces of paper or
duplexed with both front and back of sheet printing.

Try this with the workbook open: File | Print
and then use the [Properties] button for the printer to set up for duplex
printing if it is available on the dialog(s) that are provided at that point.

"old spice" wrote:

I have an excel spreadsheet, on 2 worksheets, Since each sheet has a
different number of rows and columns, I cant put them both on 1 sheet. I
want to print them back to back on one sheet of paper. My printer is
capable of two sided work, but it wont work. How can I do this?