Google introduced Bubbles last year with the second Android Q beta. The feature would allow users to view notifications and conversations from messaging apps in the form of floating overlays, pretty much like the Facebook Messenger's chat heads. It wasn't formally announced with the stable release of Android 10 but hidden in the developer options. Around the end of 2019, Google even started testing it for conversations in the Messages app. With Android 11 Developer Preview, Google is not only introducing new features but also reintroducing many others that were initially teased and then later dropped from or hidden in the final release of Android 10. The Bubbles feature is getting additional functions, including the ability to take screenshots of just the bubble area instead of the entire screen.
Android 11 tests letting you take screenshots of floating bubble messages
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