I had a PPT presentation with just 1 slide.  It was a nice picture.
The size of the document was 150K.  My boss liked the picture, and he
wanted me to add that slide to his presentation.  He emailed me his
presentation (size 5M), and I copied my slide to his presentation,
using the "Slide Sorter View".

Then I made some small changes to my slide.  Finally, in order to
retain the updated version of my slide for my records, I deleted all
but my slide from the presentation, again using the "Slide Sorter
View".  The presentation now had only one slide --- mine --- but now
it's size was 5M!  Please recall that previously my slide was only
150K.

It gets even more interesting.  I copied my "fat" slide back into my
boss' presentation.  I was expecting the size of the presentation to
bloat to 10 M (5M original size and 5M my single slide size).  However,
lo and behold, the overall size of the file only increased by around
150 K.

The only way that I can rationalize it is that there is a lot of
archival junk in my PPT presentation.  Does anyone know how to remove
that?  I will consider all the archival junk removed if I can trim the
slide size down to around 200K or so.

Thanks,
Bhta