Check out example codes for "make scaffold scrollable flutter". It will help you in understanding the concepts better.

Code Example 1

@override
 Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: Text('News'),
    ),
    body: SingleChildScrollView(  // <-- wrap this around
      child: Column(
        children: <Widget>[
        ],
      ),
    ));
  }

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