The following code is responsible for displaying the characteristics of the device (I shortened code for ease of demonstration, but the essence of my question is visible.). It's very simple. Tell me how to add the lines that I marked in the photo in red. Exactly this length, and exactly at this distance from the text. return Scaffold( body: Align( alignment: Alignment.topCenter, child: Container( constraints: BoxConstraints(maxWidth: 800, maxHeight: 300), decoration: BoxDecoration( color: Colors.black, borderRadius: BorderRadius.circular(5.0), ), child: SingleChildScrollView( child: Card( child: Column( children: [ ListTile( title: const Text('Brand:', style: TextStyle(fontWeight: FontWeight.w400, fontSize: 25)), trailing: Text('${device.brand} ', style: const TextStyle(fontWeight: FontWeight.w400, fontSize: 20 ))), ListTile( title: const Text('Operation system:', style: TextStyle(fontWeight: FontWeight.w400, fontSize: 25)), trailing: Text('${device.operation_system} ', style: const TextStyle(fontWeight: FontWeight.w400, fontSize: 20 ))), ],),)))));}} Continue reading...