You can encounter all kinds of "fun" with this one (I have developed a
number of these for digital signage).
(1) Orientation
Before you even design anything, you need to create a method for hanging the
display that works with the presentation you create. Will the controls on
the display be on the left or right when it is hung? If you switch them,
then your display is upside down.
(2) Display Options
The best scenario is if the display has an option to rotate its input from
landscape to portrait. This way you can design a 9x16 (tall) presentation
and have the display orient it to look right. But reality is very few have
this option.
(3) Write Sideways
For the most part you need to create a 16x9 presentation (go to FILE >> PAGE
SETUP >> change the size to 16" wide x 9" tall) and design everything
sideways. So if the display is landscape the presentation looks sideways,
but when the display is mounted vertical/tall all is displayed properly.

Signature
Troy Chollar
TLC Creative Services, Inc.
troy at tlccreative dot com
www.tlccreative.com
-----------------------------------------
A Microsoft PowerPoint MVP
Host of www.ThePowerPointBlog.com
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>I want to make a powerpoint presentation in a 16:9 vertical format so that
>it
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> easily and then output it so it looks wonderful on a Hi-Def television
> monitor mounted vertically.