Align widget

Align(
  alignment: Alignment.topRight,
  child: Text("widget"),
)

Center(
  child: Container(
    height: 120.0,
    width: 120.0,
    color: Colors.blue[50],
    child: Align(
      alignment: Alignment(0.5, 0.6),
      child: FlutterLogo(
        size: 60,
      ),
    ),
  ),
)