Well as a macOS user, there’s an application which is very good for this and has a plugin with numerous IDE/Text editor: Dash.

Once you’ve downloaded the language doc, for some languages you got access to “docsets”, that’s the case for Elixir/Erlang.

CleanShot 2021-07-18 at 19.10.16858×730 63.5 KB

It’s not terminal based, but once downloaded it’s ok to use offline, plus it updates automatically.

CleanShot 2021-07-18 at 19.12.101367×935 79.5 KB

IDK if it’s okay to promote something like this here but, since it’s a tool, a cheap one furthermore, I guess there’s no problem.

I almost forgot to talk about TL;DR, which is a nice terminal based tool, it’s FOSS so you can participate easily.
It’s, you named it, a shorter version of man.
Nice to quickly find something.

CleanShot 2021-07-19 at 08.51.45896×371 29.7 KB

Today I learned that man pages for Erlang are installed by default with the installation of Erlang. You don’t need to install man pages manually, but you need to access it through the erl command with -man flag instead of the man command, for example erl -man lists.
I wish to know how to list all the modules using erl -man command.