If you save your PowerPoint or Keynote file as a PDF and use an iPad with a PDF viewer to project your presentation, you can pinch and zoom into slides without sophisticated slide design techniques or special tools such as Prezi.

PowerPoint for iPad does not support it (yet).

If you liked this post, why not subscribe to daily updates about presentation design via email? Just blog posts, no spam, or you can follow Jan on Twitter to never miss a thing.