Series.Smooth Property (Excel)
True if curve smoothing is turned on for the line chart or scatter chart. Applies only to line and scatter charts. Read/write.
Syntax
expression .Smooth
expression A variable that represents a Series object.
Example
This example turns on curve smoothing for series one in Chart1. The example should be run on a 2-D line chart.
Charts("Chart1").SeriesCollection(1).Smooth = True