How to change username in forum? (Not display name)


I want to chance my username (that you can see if you click on a name), how i can do or who can help me?
Thanks in advance

Hover on PROFILE > Account Settings (Screenshot by Lightshot)

Then you will see there is a setting that you can change your visible name on forum. You cannot change your real name if I am not wrong.

Even moderator cannot?

Sorry only your display name can be changed.