How to enable Header section in graphiql playground?

enter image description here

I am using the graphql-HTTP package. And there is no tab for passing tokens (headers) in the playground.
So Have to enable it?

I’m declaring as below

 app.use(
      "/graphql",
      graphqlHTTP({
        schema: UserTypes,
        rootValue: UserResolver,
        graphiql: true,
      })
    );