As Michaels says, you can password your file.
Another option is to give permissions to the document. It's under Office
Button | Prepare | Restrict Permission. Not all versions of PPT have this
option -- I believe it's available only in Office Professional Plus,
Enterprise, and Ultimate.
Just be aware that nothing is infallible. If it can be shown, it can be
copied or recreated.
--
Echo [MS PPT MVP]
http://www.echosvoice.com
What's new in PPT 2007?
http://www.echosvoice.com/2007.htm
Fixing PowerPoint Annoyances
http://tinyurl.com/36grcd
PowerPoint 2007 Complete Makeover Kit
http://tinyurl.com/32a7nx
MZ said:
Is there a way to lock a powerpoint 2007 presentation so that it cannot be
altered by other users (MS states that the Mark as Final feature can be
turned off by users)?
Thank you