Turn Music Sideways.

Hey guys, so I'm in a 7/8th grade jazz band and we are playing Louie, Louie. I play the piano and jazz band and there is no piano part, so I'm arranging one. My only problem is the rest of the pieces are horizontal, not vertical, because this song is for marching band. Is there any way I can change the arr. to horizontal? I've already typed up most of the piece. If not, that's okay. It's kind of a FWP. Any help would be appreciated.