SelectableText

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(home: MyApp()));

class MyApp extends StatelessWidget {

static const String _lorenIpsum = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec iaculis orci vel tempor dignissim. Praesent nisl neque, iaculis et euismod ut, dignissim non arcu. In vel convallis mauris, a viverra turpis. Curabitur ac erat pulvinar, mattis nisl eu, placerat risus. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Duis cursus, nisi eu molestie vulputate, libero tellus convallis purus, id cursus sapien orci at velit. Duis placerat et massa et molestie. Quisque id elit blandit, tempor nulla non, faucibus ex. Pellentesque elementum cursus neque, vitae ultricies massa molestie nec. Morbi a eros finibus, sagittis mi eget, gravida.';

@override
  Widget build(BuildContext context) => Scaffold(
    body: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      crossAxisAlignment: CrossAxisAlignment.center, 
      children: <Widget>[
        Container(
          height: 300,
          width: 200,
          child: SelectableText(
          _lorenIpsum,
          style: TextStyle(
          fontSize: 16,
          height: 2,
        ),),),
        SelectableText(
          _lorenIpsum,
          style: TextStyle(
          fontSize: 16,
          height: 2,
        ),),
      ],));
}