What methods does Fitzgerald use to present Gatsby in chapter 3?

Fitszgerald uses Gatsby's absence at his own parties to develop Gatsby's character. Gatsby hence becomes an enigma to which various gusts speculate about. HHe gets a certain amount of peripheral respect because of his enormous wealth. When we finally meet Gatsby he is good looking, charming but reserved. Then we can add all gossip and innuendo we have heard about Gatsby. This creates the mystery and enigma that Fitszgerald carefully crafts.