[texhax] About the seminar class

[Yanjun Yan]

Hi,

While I am using \documentclass[10pt,letterpaper]{seminar} to prepare my 
slides by WinEdt and MikTex, I can see its proper format in landscape in Yap, 
But whenever I tried to print it into ps or pdf, the paper is the shape of the 
portrait thus the right half of the slides are truancated.

Do you know why this happened and how it can be solved?

Thanks a million!