I have a serious question

For genderfluid people. I know about non binary and gender neutral people which is androgyny but I do get a little confused about someone not having a consistent gender identity or an identity that changes over time. How do you demonstrate to others what you wish to be called at any given time? Do you just ask people to use your names? What kind of pronouns and forms of address do you use? I am seriously asking genderfluid and genderqueer people because I want to understand.