Quote from user guide:
Default profiles can be modified or deleted from the radio using the Profile Manager, but will be restored if the radio is reset to the factory defaults (see section 30.12).
Note: Default profiles can be modified, but the modifications cannot be saved using the default profile name. A new profile name has to be entered.14.7 COMPARING PROFILES AND PERSISTENCE
Profiles are different from persistence. As described above, profiles are a way to manually save and restore a complete radio configuration and then return to that configuration later. Profiles require action on your part to both save and restore, but are a very quick way to put the radio in exactly the state you want.Persistence, always enabled on your Signature Series radio, remembers settings from band to band without your direct action so that when you return to a band your settings are restored. For example, if you are operating on 20m and set the output power to 60W, then go to 10m and set the output power to 100W and then go back to 20m, persistence will return your 20m power to 60W. Resetting the radio to the factory settings (see section 30.12) will clear the persistence settings.
Problem is: there is NO section 30.12.
Question is: How DOES one "reset radio to factory settings"?