Ignore When Autoscaling

Calling Plot.Axes.AutoScale() or middle-clicking the plot will set the axis limits to fit the data. By default the position of axis lines and spans are included in automatic axis limit calculations, but a flag can be set to ignore certain plottables when automatically scaling the plot.

AxisLines.cs

ScottPlot.Plot myPlot = new();

myPlot.Add.Signal(Generate.Sin(51));
myPlot.Add.Signal(Generate.Cos(51));

var hline = myPlot.Add.HorizontalLine(0.23);
hline.IsDraggable = true;
hline.EnableAutoscale = false;

var hSpan = myPlot.Add.HorizontalSpan(-10, 20);
hSpan.IsDraggable = true;
hSpan.EnableAutoscale = false;

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

Edit on GitHub

This recipe is one of many in the Axis Lines category