Back in March 2005, an EZView user told me about his colleagues who prefer to work at 100% zoom level and how this was driving him insane since he had to change the zoom level every time he opened a presentation. Presumably this is because they work on high resolution (1600×1200) displays but he doesn’t. (Neither do I. My primary machine is an IBM ThinkPad X30 running at 1024×768 even though my desktop can do 16-by-12.)
But given what I’ve learned from writing EZView, I told him confidently, “I can fix it!” 
Ladies and Gentlemen, from your Iron Monkey-wanna-be comes a new PowerPoint plug-in: whenever a presentation is opened, it will adjust the zoom level to “Fit”. Please let me know of any bugs.
http://www.cs.cmu.edu/~maverick/Programs/ZoomToFit/
The icon I used is from the Kids Icon Theme by Everaldo Coelho. Kudos!