Landscape output from ps.map on Tek Phaser III

Does anyone know how to get landscape output from ps.map on a
Tektronix Phaser IIIpxi printer?

We have tried modifying length and width in the ps.select file,
but this did not work.

Any help would be greatly appreciated.

Dan Hough e-mail: dhough@uoknor.edu
Oklahoma Biological Survey
Norman, OK 73019