More documentation about documentation comments coming soon :-)
Dgraph accepts GraphQL documentation comments
"""...""" that gets passed through to the generated API and thus shown as documentation in GraphQL tools like GraphiQL, GraphQL Playground, Insomnia etc.
You can also add
# ... comments where ever you like. Those are just like code comments in the input schema and get dropped.
Any comment starting with
# Dgraph. is reserved and shouldn’t be used to document your input schema.
This is a companion discussion topic for the original entry at https://dgraph.io/docs/graphql/schema/documentation/