You can now react to any message in Slack with an emoji of your choosingWorkplace chat phenomenon Slack today is adding a feature that fans of picture-based communication will find totally :thumbsup: — the ability to react to any message with one of 722 emoji. Now when you mouse over or tap on a message, you’ll have the ability to react with a star or any other emoji, and the author will get a notification in their mentions tab. All the emoji posted to a message pop up underneath them, along with a counter to show you how many people feel the same way you do.