Please advise - how to add MDI to "Main window" / console ?

[Anonymous_Banned275]

Bump /addendum

Am I on the right track?
I have added QMdiArea and replaced

setCentralWidget(m_mdiarea);

I cannot "see" the title window of the added Mdi Area ....

   m_ui->setupUi(this);
    m_console->setEnabled(false);

    // create mdi area
    setCentralWidget(m_mdiarea);
    m_mdiarea->setEnabled(true);
    m_mdiarea->setWindowTitle(" MDI area ");
    m_mdiarea->show();
    m_mdiarea->setVisible(true);
    // test resize ??
    m_mdiarea->activateWindow();

I am using QT example "simple terminal" .
I am struggling with its code , mainly because it was not created using QTDesigner , hence QTDesigner cannot be effectively used to make changes.

As is - the "main access " to the code (keyboard - serial port I/O) is via "console".

(see the black area in attached screen shot )

That works fine, however, I like to "split" the console physical size and have "console " I/O area - as of now -
and new , separate MDI area.

How do I add MDI area to share same space as current console?

.

//! [0]
MainWindow_Bluetooth::MainWindow_Bluetooth(QWidget *parent) :
    QMainWindow(parent),
    m_ui(new Ui::MainWindow_Bluetooth),
    m_status(new QLabel),
    m_console(new Console),
    m_settings(new SettingsDialog),
    //! [1]
    //! add rfcomm ??
    m_serial(new QSerialPort(this))
  //! [1]
{


    //! [0]
    m_ui->setupUi(this);
    m_console->setEnabled(false);
    setCentralWidget(m_console);

// actions 
    m_ui->actionConnect->setEnabled(true);
    m_ui->actionDisconnect->setEnabled(false);
    m_ui->actionQuit->setEnabled(true);
    m_ui->actionConfigure->setEnabled(true);
    m_ui->statusBar->addWidget(m_status);
    initActionsConnections();

    connect(m_serial, &QSerialPort::errorOccurred, this, &MainWindow_Bluetooth::handleError);

    //! [2]
    connect(m_serial, &QSerialPort::readyRead, this, &MainWindow_Bluetooth::readData);
    //! [2]
    connect(m_console, &Console::getData, this, &MainWindow_Bluetooth::writeData);
    //! [3]
}
//! [3]![Screenshot from 2023-04-15 10-13-44.png](https://ddgobkiprc33d.cloudfront.net/f2dffa09-09e4-4621-9aea-811f3a11be25.png)