OptionallineStroke width in pixels. When omitted, falls back to ToolsOptions.lineWidth.
OptionallineStroke color. When omitted, falls back to ToolsOptions.lineColor.
OptionalopacityObject opacity as a percentage (0–100).
OptionalrotationObject rotation in degrees.
OptionalstartCap style applied to the start endpoint of the line.
OptionalendCap style applied to the end endpoint of the line.
OptionalcapSize of the endpoint caps in pixels.
OptionalcapColor of the endpoint caps. When omitted, matches the line color.
Default style options for Line objects.