Thanks, but does this mean that I can never use an iCloud.com email address to replace the Apple ID that has a gmail.com address? Because, is not an iCloud.com email address always associated with a separate Apple ID? If so, I could only replace the email address of my Apple ID with a gmail.com address with an email that is not iCloud.com or any other that is being used with an existing Apple ID.
I want to change my gmail.com Apple ID to give it an iCloud.com address but to do that, I would need to create a new Apple ID to get it. But that in turn means it is now associated with a new Apple ID and can't be used to replace the email address for my gmail.com Apple ID. It looks like I would have to give it new gmail.com address or get a hotmail one, etc.
Ed