Request a function where if you want to edit the relationship list (add or remove) the pop-up window for the option shows what has already been selected previously.

I would like to request a function where if you want to edit the relationship list (add or remove) the pop-up window for the option shows what has already been selected previously.

Currently if you want to edit it, the list does not show which one you have already selected and it is not insightful or user-friendly.