the question is ambiguous, but perhaps what you are looking for
might be file, page setup, sheets, where you can choose
Page order: down then over, or over then down

If you are doing duplex printing with two sheets wide then you
would probably want to switch to over then down.

I probably guessed correctly because after writing that, I noticed the wording
in the subject that was NOT included in the question. Please write a clear and
complete question that does not rely on part of the question being in the subject.