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Is there anything special about `Scaffold` ? I always compared it to `AppBarLayout`  but it seems that it is OK to nest `Scaffolds` . Even Now In Android does it. <https://github.com/android/nowinandroid>. It `Scaffold` just a special kind of `Column` following some Material design parameters?

A `Scaffold` is just a container that positions typical elements on a Material screen correctly. It places your floating action buttons, top bars, bottom bars and stuff, and makes sure that they adhere to Material guidelines such as moving the FAB when a snackbar pops up etc. Nesting several `Scaffold`s is not a problem, as long as you keep track of the various `ScaffoldState`s. :simple_smile:

I just tried it out. I have a `Scaffold(BottomBar) -&gt; Scaffold(TopBar)` below it. And the content of the second scaffold draws over its own TopBar. Do I have to somehow use padding to make this work?

You do receive a `PaddingValues` in the `content` block of the `Scaffold`. You should probably apply that, yeah. :+1: