Emacs key bindings and troubleshooting

emacs.md

Emacs

Basic Key Bindings

• Shortcut starts with C-x.

• Command name starts with M-x.

• Custom shortcut starts with C-c.

• C-x C-c: Exit Emacs.

• C-x C-f: Find file.

• C-x C-s: Save file.

• C-v: Page down.

• M-v: Page up.

• M-<: Go to the beginning of the file.

• M->: Go to the end of the file.

• C-/: Undo.

• C-x u: show undo tree (if undo-tree installed)

• C-g: Cancel any command. If you don't know what's happening, press this.

• C-x 1: Make only one window visible.

• C-x 2: Horizontal split.

• C-x 3: Vertical split.

• C-x 0: Kill this window.

• C-Space: start selection.

• C-x C-j: Go to dired (dired-x).

• <XF86Forward>: C-x Left: Switch to previous buffer.

• <XF86Back>: C-x Right: Switch to next buffer.

Get help

• C-h f: help for function under cursor.
• C-h k: help for given key binding.
• C-h m: help for current major and minor mode key bindings.

Read Program Info

C-h i

M-x commands

• linum-mode: show line numbers.

Org Mode

• C-x C-j jump back to dired mode

Tasks

• C-c C-t to toggle TODO

• M-S-RET to insert TODO

• C-c C-c to toggle check

• M-S-RET to add

• [ ] check box

• C-c C-s schedule

• C-c C-d deadline

Header

• M-RET same level
• C-RET same? level
• M-LEFT/RIGHT move level
• M-UP/DOWN move up and down
• M-S-UP/DOWN move subtree line up and down
• C-c C-c on header to tag
• C-c C-q in text to tag
• C-c / find todo or a tag
• C-c C-j remember this place and C-c & to jump back

Org Mode Manual: Structure Editing

Fold

• TAB fold
• S-TAB fold all
• C-x n s zoom in subtree
• C-x n w zoom out subtree
• C-c C-x b show subtree in another window
• C-c C-k show children headers only

Org Mode Manual: Structure Editing

Image

[[./org-mode-unicorn-logo.png]]

• Show image: org-toggle-inline-images

Link

[[http://orgmode.org/worg/org-tutorials/orgtutorial_dto.html][org tutorial]]

Table

• C-c C-c update table

Comment

• # Comment
• C-c ; comment out

Code

• <s TAB insert source
• C-c ' edit code
• C-c C-c back

#+BEGIN_SRC python

def func(arg):
    pass

#+END_SRC

Troubleshooting

Fix fcitx Chinese input method not working in GUI

cp /usr/share/applications/emacs.desktop ~/.local/share/applications/emacs.desktop

Edit the line to:

Exec=env LC_CTYPE=zh_TW.UTF-8 emacs %F