I like to imagine someone swimming in the Gulf of Mexico when Google unceremoniously renamed it to the Gulf of America. There they are, backstroking across the pristine green and blue waters as the giant words float down from the sky and land on top of them.

The change comes weeks after President Donald Trump signed an executive order to officially change the gulf's name in the U.S. Geographic Names Information System. But it won't affect all users — here's what to know.