doc_src/cmds/help.rst
.. synopsis::
help [SECTION]
help displays the fish help documentation.
If a SECTION is specified, the help for that command is shown.
The -h or --help option displays help about using this command.
If the :envvar:BROWSER environment variable is set, it will be used to display the documentation.
Otherwise, fish will search for a suitable browser.
To use a different browser than as described above, you can set $fish_help_browser
This variable may be set as a list, where the first element is the browser command and the rest are browser options.
help fg shows the documentation for the :doc:fg <fg> builtin.
Most builtin commands, including this one, display their help in the terminal when given the --help option.