Bulk Handler How to edit

I saw that edit and add function was added to bulk handler recently. http://issues.freepbx.org/browse/FREEPBX-10077

There is no column dedicated to these functions in an exported csv file though, like it was in bulk extensions module.
Shall I just add a column in the csv file I want to import and what is the correct header?

When you upload on the verification screen you will be presented with an option to overwrite.

As for deleting you can do that from the grid of the modules.