Do you want to request a feature or report a bug?
Feature

What is the current behavior?
There is no documentation to explain all the layout parameters available in single-line-diagram. We need a short functional description for each of them, ideally with a svg illustrating the changes.

What is the motivation / use case for changing the behavior?
Help the users of single-line-diagram customizing the algorithm, and promote the new features! but that might also lead to a clean up (some old parameters seemed to be useless now)

Other information
Note that a link to that required page was already created in PR API guide for single line diagram #161