Legend manipulation

Hi,
In a plot, I have a curve with huge number of points. To make for good printing, i don't show symbols on curves, but rather use markers to show a select few on them.
There are other curves too. Now I want to show a legend for

1. Only some of the curves on the plot
2. with the symbol of markers

I know this is quite irritating a thing to ask for, but is there a way to do this! I am using Qwt6.
Thanks in advance!

Markers and curves are plot items and for each item you can configure if it is supposed to appear on the legend or not:

Code:

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QwtPlotItem::setItemAttribute( QwtPlotItem::Legend, true/false);

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With reimplementing YourCurve::drawLegendIdentifier() you can display your marker symbol.

Uwe