All of Emacs's help is under C-h by default.
C-h C-h (Control-H, pressed twice) brings up the menu, most useful ones are in bold.
For example, to figure out what a key does, press C-h k (key combination).
Key | Description |
a PATTERN |
command-apropos. Give a substring, and see a list of commands (functions interactively callable) that contain that substring. See also the apropos command. |
b |
describe-bindings. Display table of all key bindings. |
c KEYS |
describe-key-briefly. Type a command key sequence; it prints the function name that sequence runs. |
C PATTERN |
describe-coding-system. This describes either a specific coding system (if you type its name) or the coding systems currently in use (if you type just RET). |
d PATTERN |
Show a list of functions, variables, and other items whose |
e |
Go to the *Messages* buffer which logs echo-area messages. |
f FUNCTION |
describe-function. Type a function name and get documentation of it. |
F COMMAND |
Display the frequently asked questions file. |
g |
Display information about the GNU project. |
h | Display the HELLO file which illustrates various scripts. |
i |
info. The info documentation reader. This is where the Emacs manual is. |
I METHOD |
describe-input-method. Describe a specific input method (if you type its name) or the current input method (if you type just RET). |
k KEYS |
describe-key. Type a command key sequence; it displays the full documentation. |
K KEYS |
Show the Emacs manual’s section for the command bound to KEYS. |
l |
view-lossage. Show last 300 characters you typed. |
L |
describe-language-environment. This describes either a specific language environment (if you type its name) or the current language environment (if you type just RET). |
m |
describe-mode. Print documentation of current minor modes, and the current major mode, including their special commands. |
n |
view-emacs-news. Display news of recent Emacs changes. |
p |
finder-by-keyword. Find packages matching a given topic keyword. |
s |
describe-syntax. Display contents of syntax table, plus explanations. |
t |
help-with-tutorial. Select the Emacs learn-by-doing tutorial. |
v VARIABLE |
describe-variable. Type name of a variable; it displays the variable's documentation and value. |
w COMMAND |
where-is. Type command name; it prints which keystrokes invoke that command. |
C-a |
Information about Emacs. |
C-c |
Emacs copying permission (GNU General Public License). |
C-d |
Instructions for debugging GNU Emacs. |
C-e |
External packages and information about Emacs. |
C-f |
Emacs FAQ. |
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