emacs.md

Emacs Cheatsheet

General

Command	Function
C-g	Cancel
C-/	Undo
C-x C-c	Quit
F10	Menu
M-x ansi-term	Open terminal

Files

Command	Function
C-x C-f	Open file
C-x C-s	Save file
C-x C-w	Save as
C-x s	Save all buffers

Editing

Command	Function
C-k	Delete to end of line
C-DEL	Delete next word
M-BKS	Delete previous word
M-^	Join with previous line
C-t	Transpose two characters
M-t	Transpose word to right
C-x C-t	Transpose lines1
C-a C-space C-n M-w C-y	Duplicate line
M-^	Join to previous line

Cut 'n' Paste

Command	Function
C-space	Start marking2
C-x h	Mark all
C-w	Cut from mark to point
M-w	Copy "
C-d	Delete "
C-y	Paste ("Yank")
M-y	Paste older items
C-x r t foo	Rectangular edit - type foo

Case Conversion

Command	Function
M-l	Convert following word to lower case (downcase-word)
M-u	Convert following word to upper case (upcase-word)
M-c	Capitalize the following word (capitalize-word)
C-x C-l	Convert region to lower case (downcase-region)
C-x C-u	Convert region to upper case (upcase-region)

Search and Replace

Command	Function
C-s	Search
C-r	Search backwards
ESC C-s	Regexp search
ESC C-r	Regexp backwards
M-v replace-regexp RET pattern RET replacement	Regexp replace

Query replace

Command	Function
ESC % RET replace RET replacement	Query replace
Space or y	Replace
DEL or n	Skip
!	Replace all
RTN or q	Quit

Buffers and Windows

Command	Function
C-x b	Switch to buffer (by name)
C-x C-b	List buffers (and select)
C-x →	Next buffer
C-x ←	Previous buffer
C-x 0	Close current window
C-x 1	Close other windows
C-x 2	Split windows vertically ◒
C-x 3	Split windows horizontally ◑
C-x o	Switch to other window

Navigation

Command	Function
C-v	Page down
M-v	Page up
M-g M-g	Goto line
M->	End
M-<	Start
C-a, C-e	Start, end of line
C-f, C-b	Forward, backward one character
C-n, C-p	Next, previous line
M-f, M-b	Forward, back one word

Macros

I.e. record and playback

Command	Function
C-x (	Start recording
C-x )	Finish reording
C-x e	Execute
.. e	Execute again
ESC n C-x e	Execute n times

Python

Command	Function
C-c !	Python shell
C-c C-c	Execute current buffer
C-c C-t	insert import ipdb; ipdb.set_trace()

Misc

Command	Function
C-h t	Tutorial
C-h r	Manual
C-h C-h	Help about help
M-x load-theme	Load theme
C-x * Q	Quick calc

Custom

(Only with my ~/.emacs.d/init.el.)

Command	Function
M-↑	Move line up
M-↓	Move line down

Key

Symbol	Key
C	Ctrl
M	Meta. Usually Alt, often Esc in Mac terminal apps.

Footnotes

1. Move the line above, and the cursor, both down one line. ↩

2. Control & cursor keys work for marking regions too, followed by C-w or M-w or so forth. ↩