Global Transparency

The transparency of the entire heatmap can be adjusted.

Heatmap.cs

ScottPlot.Plot myPlot = new();

double[,] data = SampleData.MonaLisa();

// create a line chart
myPlot.Add.Signal(Generate.Sin());
myPlot.Add.Signal(Generate.Cos());

// plot the heatmap on top of the line chart
var hm = myPlot.Add.Heatmap(data);
hm.Position = new(10, 35, -1.5, .5);
hm.Opacity = 0.5;

myPlot.SavePng("demo.png", 400, 300);

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This recipe is one of many in the Heatmap category