KNX manually adding group addresses after importing project file

New here. I imported a knx project file with the “new” knx integration. It works perfect! However now I would like to modify by eg. adding a new group address with a new function. Where can I add this new group address?

Hi :wave:!
There is no manual editing option. You can however always create a new GA in ETS, assign a DPT if you like, and ex-Import again.