Callout はラベルを表示し、プロット上の点を示す矢印で接続されます。

ScottPlot.Plot myPlot = new();

double[] xs = Generate.Consecutive(15);
double[] ys = Generate.Sin(15);
myPlot.Add.Scatter(xs, ys);

myPlot.Add.Callout("こんにちは",
    textLocation: new(7.5, .8),
    tipLocation: new(xs[6], ys[6]));

myPlot.Add.Callout("世界",
    textLocation: new(10, 0),
    tipLocation: new(xs[13], ys[13]));

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