Reference Objects
You can add the Reference objects to your Scatter Chart.
X- and Y- Axis Reference Lines
Reference lines are vertical or horizontal lines in a graph, related with user-defined values on the x-axis and y-axis respectively. Mathematically speaking a horizontal reference line is displaying all x-values for a given y and a vertical reference line is displaying all y-values for a given x. You can add them easily in your Scatter Chart by just defining the values and labels for X- and Y-Axis reference lines.
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Style each of your reference lines.
Label
Choose the label color.
Set the font-size of the label.
Set the font Family of the label (choose one or define your own).
Decide whether you wish to make the label bold/italic/underlined.
Adds shadow effects to your label.
Choose between vertical/ horizontal orientation. |    |  |
Choose the left/ center/ right position for the Label on Y-Axis reference line. |  |  |
Line
Define the color of your reference line.
Define the width (thickness) of your reference line.
Choose normal or dashed line style. |  | |
Show Show/Hide the reference line depending on a calculation condition. |  |