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3.4 Describe

The describe-mode function provides information about major modes.

• describe-mode (‘C-h m’)
• variable major-mode

Function: describe-mode &optional buffer ¶

This command displays the documentation of the current buffer’s major mode and minor modes. It uses the documentation function to retrieve the documentation strings of the major and minor mode commands.

If called from Lisp with a non-‘nil’ ‘BUFFER’ argument, display documentation for the major and minor modes of that buffer.