How can I add title of the QwtPlotCurve(line) which situated abive the QwtPlotCurve?

[dqrest]

Hi)I have QwtPlot , QwtPlotCurve which consist of 2 points - line. I'd like to add title for QwtPlotCurve which situated above the line , like the title of QwtPlotmarker. How can I do it???I saw the documentation and examples and I didn't find it!Please, help!