I've been coding in Android Studio for a while now, be as in Kotlin and currently in Flutter. Whenever I am watching tutorials or lectures I see some-how they make a small window pop up that kinda shows some info. Here is a quick screenshot what I'm talking about:

I'm just bit curious about that because I know in Flutter you can press alt+enter to wrap certain widgets in other widgets. How do I get that window up?
Kind regards,
Mike