Variable: prefix-help-command

prefix-help-command is a variable defined in keyboard.c.

Value

describe-prefix-bindings

Documentation

Command to run when help-char character follows a prefix key.

This command is used only when there is no actual binding for that character after that prefix key.

Probably introduced at or before Emacs version 19.20.

Source Code

// Defined in /usr/src/emacs/src/keyboard.c
  DEFVAR_LISP ("prefix-help-command", Vprefix_help_command,
	       doc: /* Command to run when `help-char' character follows a prefix key.
This command is used only when there is no actual binding
for that character after that prefix key.  */);