How do I change my profile name

My name here is my email address. How can I change it to my name?

Click on your Avatar picture on the upper right-hand side of the screen, then click on the gray name “ten_for_technology” at the top of the popup window that comes up (next to the little person icon). Then choose Preferences from that menu. You’ll see the option there to change your username.

go to your avatar (or the greyed out profile image)
go to settings
make your changes
save your changes (bottom of page)

Can find my user name in preferences, but a possibility to change it is nowhere a option. Sorry.