New Rule for all PowerPoint users: If you’re presenting on a widescreen, switch to 16:9 slides. Otherwise, you get big black vertical bars on either side of your presentation that amount to nothing but wasted space. Open it up from small screen to big screen. And if you don’t know how to do that, spend the 2.8 seconds and 5 nano-joules of energy required to run a Google search and find out. Your audience will be grateful.

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