Looking at Your zsh Configuration Files
Your first step in modifying or adding zsh environment variables in your configuration files is to look at the configuration files, which show you the variables that are explicitly defined. As Code Listing 8.5 shows, you do this using more or the editor of your choice.
Remember that zsh configuration files exist in two places:
Code Listing 8.5. Your zsh configuration files set up your environment variables and other features of your Unix experience.
To look at your zsh configuration files: