Specifies the kind of pen that should be used to draw the major grid lines. Set Pen to specify the pen to use for drawing major grid lines in the chart. The value of Pen is a TRSPen object, which is TPen in VCL and TStrokeBrush in FMX. Set the properties of the TRSPen object to specify the color, style, width, and mode of the pen.
The major grid is only drawn if it is specified in the