Gender expression is how you publicly express and present your gender. This can include behaviour and outward appearance such as dress, hair, make-up, body language, and voice. Your chosen name and pronouns like she, he, or they are also common ways of expressing your gender. Some people take hormones and may have surgery to change their body so it matches their gender identity.
Gender expression is not related to your sexual orientation. Sexual orientation is about who you’re attracted to.