Close PowerPoint.  It should prompt you to save all open
presentations before closing PowerPoint.

HTH,
Glenna

' This will do it
Dim lCount as Long

For lCount = Presentations.Count to 1 Step -1
  Presentations(lCount).Save  ' or .SaveAs or .Close or ....
Next lCount

Hello,

PowerPoint doesn't provide the functionality (Save all, or Close all
commands) that you are looking for without resorting to VBA or add-ins.

If you (or anyone else reading this message) think that it's important that
PowerPoint provide this kind of functionality (without having to resort to
VBA or add-ins), don't forget to send your feedback (in YOUR OWN WORDS,
please) to Microsoft at:

http://register.microsoft.com/mswish/suggestion.asp

As with all product suggestions, it's important that you not just state
your wish but also WHY it is important to you that your product suggestion
be implemented by Microsoft.  Microsoft receives thousands of product
suggestions every day and we read each one but, in any given product
development cycle, there are only sufficient resources to address the ones
that are most important to our customers so take the extra time to state
your case as clearly and completely as possible.

IMPORTANT: Each submission should be a single suggestion (not a list of
suggestions).