This is a mystery to me.  I have a PowerPoint presentation and in the
Security Options I set a Password to Modify.  When I or others open
this file, it prompts for a password to modify, or we can click the
Read Only button to open a read only copy.  This is exactly what I
want.  BUT I want people to have the ability to save a copy of the Read
Only file for their own use.  So, they should be able to open this file
as Read Only and select File - Save As to save their own copy of the
file.  However, when you select the File menu, the Save As command is
grayed out.  

This is not consistent with how Word and Excel operate - if I open a
Read Only version of these file types, I can do a Save As to create my
own copy/version of the original Read Only file.  

Is this by design in PowerPoint, or can it be changed?  It appears that
PowerPoint's Read Only setting is TRULY read only - you can't edit, save
as, copy slides - nothing!  Any help would be most appreciated.  Thank
you.