easiest way to change xbox gamertag?

you can do it from a browser too if the console's not handy, sign in on the xbox site, click your picture and there's a change gamertag option. same rule, first one free. friends see the new name straight away, nobody has to re-add you.

console is quickest: your profile, customise profile, then tap the gamertag itself and type the new one. the phone app does the same thing if the console's off. first change is free and every one after that you pay for, so don't burn it on a test. and if the name's already taken it hands the name back to you with a number stuck on the end rather than refusing, which is how people end up as something_4271.