Overlay

The appearance settings for the overlay of the series elements.

Name	Type	Default	Description
gradient?	"none" | "glass" | "roundedBevel" | "sharpBevel"		The gradient of the Chart series. The supported values are: "glass"—Applicable for the Bar, Column, and Candlestick series. "none" "roundedBevel"—Applicable for the Donut and Pie series. "sharpBevel"—Applicable for the Donut and Pie series.