Better documentation for the Embeddings Projector, especially graphs/edges?

[johann-petrak]

Apparently it is possible to render edges between data points in the embeddings projector but I cannot find the documentation for this anywhere. It is also not clear what other things might be possible which are not obvious or documented.
Or am I missing some obvious documentation here?

[caisq]

@hfiller since you're working on the Embeddings Projector, is it possible for you to take a look on this issue?

[johann-petrak]

Would anyone be able to point at a good starting point or commented source code for figuring out the details about rendering edges in the projector?