Hi. I asked this last year and was told that this function will be available before year end 2019 at Acymailing 6. Acymailing 5 when you click list you see the subscribers column and then you can click the user count and see all the members on that list and manage them.
Maybe I don't see it but where is this crucial option at Acymailing 6? If it is still pending function, I hope it will added soon.