After testing it out for the last few months, Facebook is now rolling out its new ‘Dark Mode‘ for Messenger – but they’ve hidden the function, Easter egg style, behind an in-app emoji trick.
Here’s how you can activate the new function – and a disclaimer, this may not be available to all users as yet (I tried it on two devices, on one, it worked, on the other it didn’t).
First, ensure the Messenger app on your device is updated to the latest version.
Next, go into any chat and head into that specific conversation’s settings by tapping on the name of the person, or people, in the discussion at the top of your Messenger window.
Within the chat settings, change the chat emoji to the moon image. Now, head back into the chat and send the same moon emoji as a message.
Source : Social Media Today