This area says Your Pseudonym is Randy. Randy realises that the public key he used to sign up to Quest(ion) Engine is is default username. The "Text Field" under this says Update Pseudonym To and next to is has a button that says Update Pseudonym.
Randy fills in the Update Pseudonym ToText Field with the name "Randy"
Randy selects the Update Pseudonybutton and sees a popup saying Pseudonym Updated to Randy, he refreshes the page and sees his Profile is no longer his EVM Public Key but Randy.