You can also pretend your working while reading reddit with this.
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There should be a keyboard shortcut for activating.
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If you want to do this natively, you can just use hot corners and change your display setting, or enable a black screensaver, depending on your preference
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Would be really handy, but guess it hasn't propagated to the UK App Store yet
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Gained me a couple of seconds each night I'm watching a movie on the projector with the mac next to my bed... even faster than touchbar display brightness controle
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