How do I change my email address for Apple Support Communities?

How do I change my email address for Apple Support Communities?

I can see my email address, but there is no apparent way to change it.

I've clicked on: Welcome sadsongs. And then clicked on each of these:

PERSONAL SETTINGS:

Change photo & avatar

Edit Profile & Privacy

Preferences

My ID, sadsongs.

Just about everything except to Add a Photo!

I saw no obvious way to change my email address, which was also used at login.

Anyone?

.