[GNC] import map editor

[Stefan Mueller]

Hallo all,
can anyone explain the purpose of the "import map editor" shown in the
tools menu?
All what I can find related to mapping imports is this:
https://wiki.gnucash.org/wiki/Bayes
http://gnucash.1415818.n4.nabble.com/Fixing-confused-bayesian
-matching-data-td4685819.html
but there is nothing about the editor.

Can anyone explain how to use it is still empty after several csv imports.

Thank you

Stefan