Emacs: View Linux man Page
How to read linux man page in emacs?
man or Alt+x
man command calls the external unix
woman is written in emacs lisp.
On Linux, they perform about equally well. On Microsoft Windows, you might try one or the other to see which you prefer.
How to read GNU “info” manuals inside emacs?
info 【Ctrl+h i】.
[see Emacs: View Info Page]