The 10-20-30 rule was invented by Guy Kawasaki, a successful Apple employee and author of many works related to presentations.
So, below is a complete and accurate description of the 10-20-30 rule, which should always be used in a presentation if you want to be successful with it.

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PS – I don’t think it’s worth reminding that since Kawasaki works at Apple, he is directly related to Steve Jobs’s presentations, which are rightfully considered one of the best in the world.

Author: Konstantin Varik