凡例項目は、垂直方向ではなく水平方向に配置できます

ScottPlot.Plot myPlot = new();

var sig1 = myPlot.Add.Signal(Generate.Sin(51, phase: .2));
var sig2 = myPlot.Add.Signal(Generate.Sin(51, phase: .4));
var sig3 = myPlot.Add.Signal(Generate.Sin(51, phase: .6));

sig1.LegendText = "信号 1";
sig2.LegendText = "信号 2";
sig3.LegendText = "信号 3";

myPlot.ShowLegend(Alignment.UpperLeft, Orientation.Horizontal);

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