TCustomSeries.OutLine
TCustomSeries
property OutLine: TChartHiddenPen;
Unit
Series
Description
The OutLine pen property determines an additional pen used to display a "border" or "outline" around a Line series.
The Line points are first displayed using the OutLine pen, set with a bigger width than the normal LinePen pen.
The LinePen property is then used to display the Line series as usually, obscuring the OutLine and giving a border effect.