k KEYS Display the full documentation for the key sequence.
K KEYS Show the Emacs manual's section for the command bound to KEYS.
l Show last 300 input keystrokes (lossage).
-L LANG-ENV Describes a specific language environment, or RET for current.
+L LANG-ENV Describe a specific language environment, or RET for current.
m Display documentation of current minor modes and current major mode,
including their special commands.
n Display news of recent Emacs changes.