Can you give me an example of the output you're asking for?

Here is how it looks like:

Usage: commands serve [OPTIONS]

  Spins up an HTTP server serving your datasets

Options:
  --profile TEXT                   Some description.

If we have PROFILE environment variable attached to the argument, maybe something like this would make sense:

Usage: commands serve [OPTIONS]

  Spins up an HTTP server serving your datasets

Options:
  --profile TEXT                   Some description.          PROFILE

or maybe this one:

Usage: commands serve [OPTIONS]

  Spins up an HTTP server serving your datasets

Options:
  --profile TEXT                   Some description.     
  PROFILE

What do you think?

Are you asking for the values of the environment variables, or the names of the variables i.e. the values you pass to envvar when creating the option?

@ajalt , not sure if I understood the question. The feature request is for printing environment variables activated via envvar when we run program --help.
If you're asking whether we should print the value of the environment variables in --help, that would be a great addition as well.

I'm not sure what you mean by activated.

If you have an option val opt by option(envvar="FOO"), are you asking for FOO to show up in the help output?

That's correct. :)