How do you...

There are so many things on here that used to be so easy to do before, I used to have an account on here and then I didn't play it and my marapet ended up dying. But now some things have changed around and I'm just sort of lost as to how you change your doll's hairstyle because I knew how to do it before, but now I'm completely lost and I don't know what to do now. If you know how to change your doll's hairstyle then write me and tell me because I am completely lost.