Innoce… Dante … Vimla … Chou-h…

When a user wants to select a different handle for their gaming account, what is the most direct way to do it today? I am looking for a path to modify my display name and the tagline so I can start fresh with a new identity. I want to make sure I follow the steps correctly so there are no errors when I try to save my name. @League_of_Legends (LoL)