Formatting Minor Grid Lines and Tick Marks

"axisname": {
"minorGrid": {
  "visible": boolean,
  "count": number,
  "lineStyle": {
    "width": number,
    "color": "string",
    "dash": "string"
   },
    "ticks": {
      "length": number,
      "visible": boolean,
      "style": "string", 
      "lineStyle": {
        "width": number,
        "color": "string"}
    }
  }
}

where;

"axisname"

Can be:

• "xaxis"
• "yaxis"
• "y2axis"
• "zaxis"

"minorGrid":

Defines the properties of the minor grid lines.

"visible": boolean

Controls the visibility of the minor grid lines. Valid values are:

• true, which draws the minor grid lines.
• false, which does not draw the minor grid lines. This is the default value.

"count": number

Is the number of minor grid lines to draw between each major grid line. The default value is undefined.

"lineStyle":

Defines the line style of the minor grid lines.

"width": number

Is a number that defines the width of minor grid lines in pixels. The default value is 1.

"color": "string"

Is a string that defines the color of minor grid lines using a color name or numeric specification string. The default value is "black".

For information about defining colors, see Colors and Gradients.

"dash": "string"

Is a string that defines the dash style. The default value is "" (which generates a solid line). Use a string of numbers that defines the width of a dash followed by the width of the gap between dashes (for example, dash: "1 1" draws a dotted line).

"ticks":

Defines the properties of the minor grid line tick marks.

"length": number

Is a number that defines the length of tick marks in pixels. The default value is 5.

"visible": boolean

Controls the visibility of tick marks. Valid values are

• true, which draws the tick marks.
• false, which does not draw the tick marks. This is the default value.

"style": "string"

Is a string that defines the tick mark style. Valid values are:

• "inner", which places the tick marks inside the minor grid lines. This is the default value.
• "outer", which places the tick marks outside of the minor grid lines. This is the default value.
• "span", which places half of each tick mark outside the minor grid line, and half of the tick mark inside the minor grid line.

"lineStyle":

Defines the line style of the minor grid line tick marks.

"width": number

Is a number that defines the width of the tick marks in pixels. The default value is 1.

"color": "string"

Is a string that defines the color of tick marks using a color name or numeric specification string. The default value is "black".