Put your button inside a Container and then set the margin
Container(
margin: const EdgeInsets.only(top: 10.0),
child : RaisedButton(
onPressed: _submit,
child: Text('Login'),
),
Put your button inside a Container and then set the margin
Container(
margin: const EdgeInsets.only(top: 10.0),
child : RaisedButton(
onPressed: _submit,
child: Text('Login'),
),