Set QPlaiTextEdit as central widget in QT Designer

[myta212]

Hi,
You can set contents margin layout with 0 like this :

centralwidget = new QWidget(MainWindow);
        gridLayout->setSpacing(0);
        gridLayout->setContentsMargins(0, 0, 0, 0);

centralwidget = new QWidget(MainWindow);
        gridLayout->setSpacing(0);
        gridLayout->setContentsMargins(0, 0, 0, 0);

To copy to clipboard, switch view to plain text mode 

And set QPlainTextEdit frameShape to QFrame::NoFrame.

plainTextEdit->setFrameShape(QFrame::NoFrame);
plainTextEdit->setLineWidth(0);

plainTextEdit->setFrameShape(QFrame::NoFrame);
plainTextEdit->setLineWidth(0);

To copy to clipboard, switch view to plain text mode 

Are this metod solve your problem?
Thank you.

Best regards,

Toto