File menu, Preview picture function

Hello all,
I normally create my lay-out in pdf format to share with my colleagues for discussion, but due to error in my Acrobat pdf creator, i tried - "preview picture" under File menu, where i can save my layout in .WMF format then insert to other application and serve same purpose as pdf.

However, i cannot change the layout to the paper size i prefer. Can anyone advise in this, Print set-up doesnt seem to work with this function.

Thanks in advance,

Cheers,