Provide the ability to set a background or text border beneath references in the reference map graph view.

[MKDJr]

Is your feature request related to a problem? Please describe.
The text of references in reference map graph view is often blocked by nodes or otherwise difficult to see without a contrasting background for the text.

Describe the solution you'd like
Provide the ability to set a background or text border beneath references in the reference map graph view.