You can use any compression application available to create a .zip file.
Most will have settings to the amount of compression desired. Basically the
higher the compression level, the smaller the file, but the longer it takes
to uncompress (unzip).
The amount of compress is dramatically impacted by the content of your
presentation. Text, charts and autoshapes will compress up to 95% while
images will compress only 10-15%.
--
David M. Marcovitz
Microsoft PowerPoint MVP
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_ http://www.PowerfulPowerPoint.com/
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