@SlackHQ is there a global pause notifications (do not disturb) button that works across all workspaces?
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It’s a great idea! Admittedly, I’m biased.
Hi Gyi! We're afraid this isn't possible. Notifications would need to be paused for each workspace, but we would be happy to take this feedback as a feature request. Thanks for sharing! 
Depending on where you're using Slack, you might be able to achieve this with an operating system setting at the moment. 