You can add Reference Bubbles to your Scatter Chart object.
Reference Bubble lets you point a circle on a graph to highlight some data.
To create a Reference Bubble define the Value for the X and Y axis.
Give a Label for your Reference Bubble.
Bubble size value defines the radius of you Reference Bubble.
Simply name the color or use the hex color code that you want to have for your Bubble.
Outer Bubble Line
Enable it if you want your Bubble to have a boarder.
Use the Slider to control the transparency of the Reference bubble.
|Bubble Outer Line and Opacity|
If enabled, the tooltip appears upon hovering the mouse over the bubble. A small "hover box" with information about the bubble is displayed.