You mean adding text within the avatar pic? I don't believe that is possible. You can just edit the photo in Paint or other photo program and add the text you want, then save that into a single jpeg file that you can upload as your avatar.
Don't recall any members having text added below their avatar in ages. I've got the impression its a thing from years ago.
I think it was ulackfocus that used to do them if I remember rightly. So yeah we're all just bog standard members from here in.
You do know that it wasn't all good news? Some are permanently saddled with sub-text like 'dumbass', 'closet dealer', 'not the sharpest tool' etc. Be careful what you wish for.
Well, I certainly don't peacock my special markings around for any old Tom Dick or Harry, you a have to ask nicely.
The first one I got was not as nice as the one I have now. Two years before it was changed. Basically it was taken from silly remarks or coined phrases that each member made over time. Can still be done, but you don’t get what you want. This would have got the member “Loses interest easily”