But when I make the top text smaller (by removing the second sentence), the input text field doesn't disappear when resizing the window.
Can somebody help me, please? Here's my sample code.

import QtQuick
import QtQuick.Window
import QtQuick.Controls
import QtQuick.Layouts

Window {
    id: window
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    Layout.margins: 5

    ScrollView {
        id: scrollView
        anchors.fill: parent

        ColumnLayout {
            width: scrollView.availableWidth
            height: scrollView.availableHeight

            Label{
                wrapMode: Text.WordWrap
                width: window.width - 20
                Layout.minimumWidth: 200
                text: qsTr("Changes to the following settings are applied to the current document and to future documents. If you only wish to change the current document use the Invoice tab.")
            }

            RowLayout {
                Label{
                    text: qsTr("Invoice title")
                    Layout.fillWidth: true
                }

                TextField {
                    implicitWidth: 200
                    text: qsTr("Document")
                }
            }
        }
    }
}