opaque-demo-app/qml/Header.qml

import QtQuick 2.7 //ApplicationWindow
import QtQuick.Controls 2.1 //Dialog
import QtQuick.Controls 2.12
import QtQuick 2.12
import QtQuick.Dialogs 1.3
import QtQuick.Layouts 1.12

Label {
	font.pointSize: 30
}