Appearance configuration for the axis major and minor grid lines.
The color of the grid lines. Accepts a valid CSS color string, including hex and rgb.
The dash type of the grid lines.
The tick-rendering step. Every nth line, where
n is the step, is rendered.
The number of lines to skip at the beginning.
If set to
true, the Chart displays the lines.
By default, only the axis major grid lines are visible.
The width of the lines in pixels.