Input instructions on Flutter
When a label might not describe the requested input sufficiently, you should add additional instructions. For example, if passwords are required to be at least 8 characters, indicate this to users.
In Flutter, you can use an
InputDecoration to show instructions for a
TextField. You need to provide a
string for the
TextField( decoration: InputDecoration( helperText: 'Your password should be at least 8 characters.', ), );