To print Mopidy’s effective configuration, i.e. the combination of defaults, your configuration file, and any command line options, you can run:
mopidy config
This will print your full effective config with passwords masked out so that you safely can share the output with others for debugging.
As you can see in the documentation, the config command doesn’t just print out your config file, it shows the default values that are being applied too. You can override these defaults by declaring the section and name=value in your config file.