Emacs: Lookup Function / Command Documentation

Alt+x describe-function

Show a function's inline doc. (commands are also functions.)

Note: Some Symbol are variable, not function, e.g. sentence-end-double-space. Some symbol are both function and variable. e.g. buffer-file-name.

To lookup variable, see Emacs: Show Variable Value, List Variables

Alt+x describe-command

Show a command's inline doc.

Like describe-function, but exclude functions that are not commands.

New in Emacs 29 (Released 2023-07)