title: How to specify symbol position on the marker?
body: <p>I am using <code>Qwt</code> library. I have added vertical <code>QwtPlotMarker</code> on the plot. I want to add <code>QwtSymbol</code> to my <code>marker</code> and I want the <code>symbol</code> to be in the bottom of the <code>marker</code>. When I use <code>setSymbol()</code> it places symbol in the middle of the marker. There are <code>setLabelAlignment()</code> function to specify where the label is drawn. Unfortunately, I did not found anything like that for <code>symbol</code>. I have read  <a href="http://qwt.sourceforge.net/class_qwt_plot_marker.html#af44231c2b63bb277706e4f515297c7b1" rel="nofollow">Qwt User's Guide</a> where I found: <code>The setSymbol() member assigns a symbol to the marker. The symbol is drawn at the specified point.</code> So, how to specify that point?</p>