Maximum size for ppt medical poster?

[NJVP]

Page Setup won't accept 96" x 72" as size for single slide (medical poster).
Is there any way to correct this? Thanks!

 

[Sandy Johnson]

I think the max size is 56 inches. Here's some info:

Printing PowerPoint: Slide size v. Printer Page size
http://www.pptfaq.com/FAQ00774.htm