This page is part of the ScottPlot 5.0 Cookbook
⚠️ ScottPlot 5.0.2-beta is a preview package
This page describes a beta release of ScottPlot. It is available on NuGet as a preview package, but its API is not stable and it is not recommended for production use. See the ScottPlot Versions page for more information.
Legend Customization
The default legend can be easily accessed and customized. It is possible to add multiple legends, including custom ones implementing ILegend.
ScottPlot.Plot myPlot = new();
var sig1 = myPlot.Add.Signal(Generate.Sin(51));
sig1.Label = "Sin";
var sig2 = myPlot.Add.Signal(Generate.Cos(51));
sig2.Label = "Cos";
var legend = myPlot.GetLegend();
legend.OutlineStyle.Color = Colors.Navy;
legend.OutlineStyle.Width = 2;
legend.BackgroundFill.Color = Colors.LightBlue;
legend.ShadowFill.Color = Colors.Blue.WithOpacity(.5);
legend.Font.Size = 16;
legend.Font.Name = FontService.SerifFontName;
legend.Alignment = Alignment.UpperCenter;
myPlot.SavePng("legend-customization.png");
Manual Legend
Legends may be constructed manually.
ScottPlot.Plot myPlot = new();
myPlot.Add.Signal(Generate.Sin(51));
myPlot.Add.Signal(Generate.Cos(51));
LegendItem item1 = new();
item1.Line.Color = Colors.Magenta;
item1.Line.Width = 2;
item1.Label = "Alpha";
LegendItem item2 = new();
item2.Line.Color = Colors.Green;
item2.Line.Width = 4;
item2.Label = "Beta";
var legend = myPlot.GetLegend();
legend.ManualLegendItems = new[] { item1, item2 };
myPlot.SavePng("manual-legend.png");
Limit Plottables in Legend
Legends typically show all plot items with populated Label fields. However, users can use the manual legend property to only show legend items from specific plottables.
ScottPlot.Plot myPlot = new();
var sig1 = myPlot.Add.Signal(Generate.Sin(51));
sig1.Label = "Sin";
var sig2 = myPlot.Add.Signal(Generate.Cos(51));
sig2.Label = "Cos";
var legend = myPlot.GetLegend();
legend.ManualLegendItems = sig1.LegendItems;
myPlot.SavePng("limit-plottables-in-legend.png");