GNU Emacs

• v view
  • Open with View Major mode if no other major mode for view is available.
  • q to exit
• C do copy, D do delete, R do rename/move
• d mark to delete
• x execute flagged delete
• i add subdirectory into current buffer
  • $, M-$ toggle hidden (of all)
  • C-M-u, C-M-d Tree up or down
  • C-M-n, C-M-p Next or previous subdirectory
• m, u mark and unmark
• T do touch, O do chown, M do chmod, G do chgrp, N do man, I do info, S do symlink, H do hardlink, Z do compress
• X do shell command
• C-x C-f to create a new file, make-directory to create a new directory.
• g revert(reload) buffer
• C-x C-q immediate edit
• ^ > < Parent directory, Sibling directory
• w copy filename to kill ring
• W browse url of dired file
  • It opens a new server editing buffer for text files, which is like a externally opened file but in the same frame.
  • C-x # to mark it done and switch to next server editing buffer.
• J goto file
• & async shell command on the file at point, X shell command on the file
• C-t thumbnail
  • . display thumbnail in other window
  • C-t toggle inline thumbnail
  • a append thumbnail to the thumbnail buffer
  • d display thumbnails of file at the cursor, or marked files
  • i display image in other window
  • j jump to thumbnail buffer
  • x display image externally
• C-t tag
  • The tags are stored in ~/.emacs.d/image-dired/.image-dired_db
    • t tag files
    • r delete tag
    • f mark tagged file
• * mark
  • m mark, u unmark, ! ? unmark all
  • * executable, / directory, @ symlink, s subdir files
  • % mark with regexp
  • * C-n, * C-p or M-{, M-} previous or next marked file
• % regexp
  • C copy
  • R, r rename
  • S symlink
  • Y resymlink
  • H hardlink
  • d flag, g flag files containing regexp
  • & flag garbage files
  • m mark
  • l, u downcase, upcase

• ls-lisp-use-insert-directory-program use external ls instead of ls-lisp, the builtin ls emulation written in Lisp, if this is t
  • This does not apply to dired-sidebar for some reason.
  • insert-directory-program the external program to be used
  • dired-listing-switches controls the options passed to the program, including ls-lisp
• ls-lisp-dirs-first
  • list directory first when using ls-lisp
• dired-use-ls-dired append --dired option

• dired-sidebar-toggle-sidebar
• TAB (dired-sidebar-subtree-toggle)
• RET (dired-sidebar-find-file) open the file in the last window
• C-o (dired-sidebar-find-file-alt) opens the file in the window selected by ace-window
• - (dired-sidebar-up-directory)

• i manual
• h help
  • h all keybindings
  • s summary appendix
  • i manual
• ? rotate through the brief help

• <, > scroll to the right/left
• {, } scroll up/down

Edit

• U undo, D redo
• <TAB> rotate the top two
  • rotate the top N elements downward while wrapping if positive
  • move the entire stack N step downward if negative.
  • <M-...> rotate upwards
• <DEL> remove the top
  • remove the top N elements if positive
  • Delete the entire stack if 0
  • N th element form the top is removed if negative
  • <M-...> remove from the bottom

Input

• <RET> duplicate the top element
• <M-RET> push the last arguments
  • recover the deleted elements by a function
• [2-32]#NN input number in a given radix
• NNeNN scientific notation
• _ negative sign
• : enters the fraction
• [ .. , .. ; .. ] vector and matrix, [ .. ] [ .. ) interval, representing all number between the bounds
  • [ ( pushes the incomplete object and complete it later.
  • { .. , .. } can also be used. comma is required
• ( .. , .. ) ( .. ; .. ) complex number (in polar),
• .. @ .. ' .. " hms time
• " string
• Operation can be put right after number
• $ can be used in place of the top stack element, the output will be replace the top
  • $$, $$$ repeatedly using dollar sign access N th element from the top
• ' algebraic input
  • Insert an expression containing symbols, equations, and various others
  • <RET> evaluate and the expression and insert
    • <M-RET> evaluate with the variables resolved, and insert
    • <C-j> or <LFD> (Line Feed) does not evaluate it, = to evaluate it later.
  • / has lower precedence than *.
  • a mod b modulo arithmetic
  • +/- to include the uncertainty
• < , : > inline function
  • The arguments are given in a vector.
  • It cannot be used on its own. It needs to be evaluated by another function, such as, call(f, a, b), v A, apply(f, v)

• They take the elements from the stack and perform certain operations
• Number prefix can be given
  • The binary operation is going to be reduce the top N elements if positive, or operate on each N next-to-top element by the top element if negative.
• +, -, *, /, ^
• \ integer division, % modulo
• : fraction
• ~ can be used to use the top element as the prefix number
• K keep the arguments in the stack by prefixing this
• Evaluation
  • = evaluate and substitute the stored variables
  • N expand the irrational values
  • a v evaluate algebra
• Simplification
  • a s algebraic simplification
  • u s unit simplification
    • Automatically applied when in UnitSymp mode

• p, pack(a, ...) pack first few top element into another object depending on the mode specified by numeric prefix N, or the value of the top element.
  • Vector of length N if N is nonnegative
  • -1 complex number
  • -2 polar complex number
  • -3 HMS form
  • -4 error form
  • -5 modulo form
  • -6 closed interval, -7 upper half-open interval, -8 lower half-open interval, -9 open interval
  • -10 fraction
  • -11 mantissa and exponent into floating point number
• u, unpack(a, ...) unpack the top element
  • negative number specifies the mode
  • It can unpack any formula as well, including equations
    • It unpack the structure given by the underlying lisp representation.
• (Without the prefix) |, vconcat(a,b) concatenate top two element into a vector, I | in reverse order, H | not recursively.
• E convert an interval into a vector of integers
• : vector into an interval
• i push an identity matrix
• d diagonal matrix out of the top
• x push the index vector
• r, c, mrow(m, i), mcol(m, i) extract the row/column of a matrix at the index of the top element or numeric prefix. s, subvec(m, i1, i2) extract a subvector from the first index up to the second index excluding it.
  • The index is counted from 1
    • A row/column is removed if negative number
  • m_i, subscr can be used for the algebraic case.
• f search for an element in a vector
• a arrange a vector or a matrix into a matrix of a given number of column
• v reverse the vector
• h, head(v) take the head, the first element of a vector.

• v evaluate the algebra, " expand into the definition
• s simplify
  • x expand: divide fractions, distribute multiplication
  • f factor a polynomial
    • H a f return the list of factors with its multiplicity.
  • c, collect express the polynomial in a given variable.
  • n, nrat(a) normalize rational (symbolic fractions into a one rational expression), a partial fraction
  • \ polynomial division, % polynomial remainder, g polynomial gcd
  • I a s trigonometric function simplification
  • H a s hyperbolic function simplification
  • a e extended (unsafe) simplification
• d derivative, i (integ(f), integ(f(x), x, a, b)) integrate
  • I (ninteg) numerical integration
• M map equation
  • Map both side of the equation
• P find the root of polynomial
• S solve the equations
  • It can also take a vector of equations and a vector of variables.
• R root finding
  • A formula or an equation is solved numerically, starting from the top element
  • It can also take a vector of equations, and a vector of initial values, a vector of variables.
  • Assigned variable can be used, _ dose not constitute a variable.
  • The formulas have to be differentiable
• F curve fitting
  • It act on a list of list containing each variables consecutively.
  • The number specify the detail
  • 1 linear, 2 - 9 multilinear
  • e, x, E, X polynomial, l, L logarithmic
  • q quadratic
  • g Gaussian function
  • s Logistic
  • …
• + sum over a given range
• * product over a given range

• Inverse modifier I, and hyperbolic modifier H are often used
• Q, sqrt(a)
• F, floor(a), I F, ceil(a)
• R, round(a), I R, trunc(a)
• J, conj(a) complex conjugate, G, arg(z) argument
• L, ln(z), E, exp(z), H L, log10(z), B, log(b x)
• S, sin(z), C, cos(z), T, tan(z), H ...
• ! factorial
• f
  • h, hypot(a,b) hypotenuse
  • Q, isqrt(a) integer square root, square root rounded down
  • n, min(m, n)
  • x, max(m, n)
  • r, re(z) real part, i, im(z) imaginary part
  • g, gamma(z) Gamma function
  • b, beta(a,b) Beta function
  • e, erf(z) Error function
  • j, besJ(n,x), y, besY(n,x) Bessel function
• k Combinatorial/Statistical
  • g, gcd(a,x) Greatest common divisor
  • l, lcm(a,x) Least Common Multiple
  • c, choose(n,m) Binomial coefficient, H ... permutation
  • b, bern(n) Bernoulli numbers
  • e, euler(n) Euler numbers, H ... Euler polynomial
  • s, stir1(n) Stirling numbers of the first kind, H ... stir2(n) of second kind
  • p test if prime
    • For a large integer, probabilistic method in The Art of Computer Programming-volume 2-section 4.5.4-algorithm P is used.
  • f, prfac(n) prime factorization
  • n, nextprime(n), I ..., prevprime(n)
  • t, totient(n) Euler's totient function
  • m, mobius(n) Möbius function
  • Probability Distributions
    • The nomenclature is X utpx, H ... ltpx for cumulative
    • The random variable is the top element
    • B, utpb(x,n,p) Binomial distribution
    • C, utpc(x,v) Chi-squared distribution
    • F, utpf(F,v1,v2) F-distribution
    • N, utpn(x,m,s) Normal distribution
    • T, utpt(t,v) t-distribution

• r random()
  • It generate a random integer between 0 and the numeric prefix, or the top element
    • a generate a number reusing the recent value
    • h shuffle
  • It shuffles the top vector, may be truncated to a desired length

• Units are just unassigned variables that are in the unit table
• Number with unit can be entered as a algebraic expression. Most common units and constants are predefined
  • eps0 ɛ0, mu0 μ0, c, G, h, hbar, e ech, k, …
• s simplify for the unit expression, a autorange unit prefix the unit with appropriate one.
• c unit convert, n convert if exact, b convert to base unit, equivalent to s base
• d, u define/undefine unit, r remove unit, u p make it permanent in the calc.el
• g get unit definition, v show unit table
• s Store
• inf, e, pi, phi, gamma, uinf, nan are preassigned variables
  • These are only evaluated by N, not =

• If the variable name is a number N it is stored in special variable qN. The quick variables can be directly specified without s
• If the top element is an assign statement: =, :=, it will perform it
• r recall, push the value
• u unstore
• t store into, store the top element
• x exchange with the top of the stack
• c copy to another variable
• +, - , … perform the operation and assign, equivalent to +=
• = evaluate to, enter the evaluation statement of the top element
  • => The expression on the left is untact, the value on the right is recomputed by = (evaluate) whenever something changes.
• d declare the type of a variable or a function
• l let

• Select within a entry and perform operation on them
• s, u select/unselect
• a add, b break selection, m l select more/less, 1, …, 9 select =N=th part
• n, p select next/previous
• d highlight selected part within the whole formula
• c clear all selection
• e enable/disable selection. the * marker disappears and the operation works on the entire formula anyway. It is enables by default.
• ' replace selection through minibuffer input
• ` edit selection through a temporary buffer
• R, L commute right/left, C commute within a selection
• D, M distribute/merge a level
• J jump equals, move a term on the other side of the equation
• +, -, *, /, … Operate on both side of a equation, or numerator and denominator of a fraction.

• f convert fraction to float, F float to fraction
• p between polar and rectangular complex numbers
• d, r, h degree, radian, hms

• t Truncate. It cuts the stack at the cursor, and stashes the ones "above" it.
• r change the radix
• c, i, j, complex number format
• Language
  • N normal, B big (pretty print), U unformatted(raw Lisp), C, L LaTeX, T TeX
  • The complex number format does not apply in B and C

• The current mode is displayed in the mode line
  • a partly algebraic mode, ( and [ also starts algebraic input.
  • t full algebraic mode, <ESC> to not use algebraic input.
• S ignore cases, the prefix key becomes case insensitive.
  • d degree, r radian
    • The default unit of the output of functions that produce angles
  • p polar mode, prefer complex number
  • f fraction mode, prefer fraction
    • c f can be used to evaluate the fractions
  • i infinite mode, 1/0 produce inf
  • s symbolic mode, the irrational result will be left symbolic
    • N can be used evaluate into numeric result
  • v matrix mode, every object is assumed to be matrices unless it cannot be
  • C toggle automatic recomputation, =>
  • Simplification
    • I basic simplification
    • U unit simplification
    • A algebraic simplification (Default)
    • N number simplification, only number operations are simplified
    • E extended simplification
    • O no simplification
  • m save modes, including display/language/precision/definition/calculation
  • g get modes, push the mode numbers
  • R record mode change directly into the file

• d toggle trail
• i, o focus into/outof trail
• n, p, [, ] move the trail marker > (to the start/end), y push trail marker to the stack
• s, r search (in reverse)

• N push current datetime
• D date into a number measured since Jan 1, 1 AD
• J convert date into Julian day count
• U convert date into unix time value
• C convert time zone of date

• It stores the values in a temporary buffer and let the Gnuplot plot it.
• f Fast plot. graph the top two element using Gnuplot. top element is the \(y\).
  • \(x\), \(y\) can be a vector of same length
  • \(x\) can be an interval, then \(y\) needs to be an algebraic expression in one unassigned variable
  • The top element can be a formula of the form xy(x(t), y(t)).
• p plot
• a, d, c add/delete/clear the plot
• g, b, k… grid, border, key
• N select the number of datapoints
• q quit the plot

• Z D bind the function to a key

• <C-x> ( <C-x> ) the global kmacro can include the following calc specific functionalities.

  • Branch
    • COND Z [ start if, Z | else if, Z : else, Z ] end if

  • Loop

    • REPEAT Z < BODY Z > repeats a command in between, the top value times.
      • REPEAT is the top element
        • INIT FINAL Z ( BODY STEP Z ) for loop, repeat with

    counter

    • INIT, FINAL are the top two elements of the stack
    • STEP is a number
      • COND Z / break out of macro loop
    • Breaks the top element COND evaluates to true.
      • Z {, Z } loop forever
    • Scope
      • Z `
      • Z '
    • Z K set macro name for the last recorded macro, which can

  be executed by z

  • Z E edit macro
  • <C-x> e or X execute macro
    • <C-x> e create a undo history for each command, X create a single undo history
• Z I define user invocation
  • m m saves this
• Z F define a formula
  • The formula at the top element is stored as key, command and function.
  • The anonymous function can also be used.
  • Z G push the formula to the stack
• Z P define a command permanently in the calc.el
• Z U undefine
• z is prefixed to use the user defined keys and functions
• Lisp
  • defmath can be used
  • (interactive NUM TAG)
    • Takes NUM arguments from the stack.
  • (calc-eval "expr") is available
• Configuration
• p set precision
  • The floating point precision default to 12
• x run calc command <M-x> calc-
• q quit

• org-latex-preview is now being worked on to include live preview and support in other major modes.
  • See Emacs 💜 LaTeX - YouTube and the documentation.
  • org-latex-preview-auto-mode
• The divpng did not work sometimes with the error .dvi was not found. Changing the relative path %f to absolute path %F fixed the issue.
  • It is not supported on the Karthink's branch
• #+startup: latexpreview renders the LaTeX expressions on startup.
  • org-startup-with-latex-preview can be also be set to t
• <C-c> <C-x> <C-l> preview the LaTeX fragment at the cursor, if no fragment for every fragment in the current entry.

#+HEADER: can be used to specify the headers

• :var
  • VARIABLE=VALUE Give parameter to the script
• :results
  • Collection
    • value return value, output standard output
  • Type: Result Type
    • table, vector, list, scalar, verbatim, file
  • Format: Result Format
    • raw, code, drawer
    • html Use BEGIN_EXPORT html
    • latex Use BEGIN_EXPORT latex
    • link, graphics Link to the file specified in :file header argument The code block output is not written to the disk
    • org Use BEGIN_SRC org block
    • pp Pretty-Print Source Code
  • Handling
    • replace
    • silent echo in the minibuffer
    • none compute the result without displaying them, but it can be used by other code blocks
    • discard The result is ignored. The value of the code block will be nil
    • append append to the buffer at the bottom
    • prepend Prepend to the buffer at the top

• Advanced features: Advanced features (The Org Manual)
• The Spreadsheet (The Org Manual)
• It can be directly entered into a cell by prefixing :=.

• The content in the first column can create a special row
  • ! name definition of columns
  • ^, _ name definition of fields in the row above (or below)
  • # make the row recalculate automatically
  • * make the row selected for global recalculation
  • / the row is not exported

• Any one of the fields in a column can be used to specify the width and alignment of the column.
  • <N> fixed width of N,with the ability to be expanded with C-c TAB.
  • <r>, <c>, <l> to align the contents
  • <rN> is also allowed

• C-c C-t (org-todo), or S-<left>, S-<right> rotate the state of TODO
• C-u C-c C-t record timestamp and a note
• C-u N C-c C-t changes to N th state.
• org-todo-keywords can be configured. See Tracking TODO state changes (The Org Manual)
  • Format: (<fast access key><entering log>[/<leaving log>])
  • The fast access key becomes available after C-c C-t
  • ! log timestamp, @ log note and timestamp
  • the leaving log only works when the target keywords does not have logging enabled.
  • | within the sequence indicates that the keywords after it are DONE state.
  • The logging is enabled when the destination is set by the org-log-into-drawer variable.
• [ / ] can be added at the end of a TODO heading to count the task done.
  • C-c C-c (org-toggle-checkbox)
  • C-c , (org-priority), S-<up>, S-<down> to change priorit
• S-M-RET (org-insert-todo-heading)
• Schedule and Deadline
  • C-c C-s to schedule a heading. C-c C-d to set a deadline
  • <DATETIME REPEATER WARNING> date can be repeated with +N[ymwdh], and warned with -N[ymwdh]
  • .+ is for repeat after done, ++ for repeat periodically.
• habit module has to be enabled in org-modules to use :STYLE: habit.

• g D (org-agenda-view-mode-dispatch) select the view format
• A add agendas to view
• D toggle diary
• g j, g k next, previous item
• g d goto date
• * mark all
• U, M, unmark all
• u undo, r redo
• Q quit
• a add note to an agenda
• m toggle mark
  • x bulk action
• S-<left>, S-<right>, H, L shift the scheduled date
  • p change date with prompt
• S-<up>, S-<down>, J, K shift the priority

• The templates are defined in the variable org-roam-capture-templates.
  • A template looks like (KEY NAME TYPE TEMPLATE SCRIPT OPTION)
    • Template: %? within the template indicate the position of the point. It can also be (file FILEPATH) to externally load the content.
      • %^NAME can be used to prompt the user.
    • Script: :if-new and (file+head FILENAME HEADER) specify the first time header creation
      • ${slug}, ${title} can be used as a placeholder.
• The files are hashed into SQL database, stored in ~/.emacs.d/org-roam.db.
  • org-roam-db-sync and org-roam-db-autosync-mode

• C-c n d daily note for today
• C-c n c capture node
• C-c n i insert node

• W, B move a WORD, which means space separated words.
• WORD, word, line, paragraph and others are collectively known as text objects.
• L bottom of the screen, H top of the screen
• u undo, C-r redo
• g f find file at point, g x open immediately
• g q fill region (automatically add line breaks)
  • g q q fill line
• J join the next line at the end of the current line.
• = auto indent, >, < indent and outdent, S start a line with auto indent
• ~ toggle case of a character
  • g ~ toggle case of a region given by the motion, g ~ ~ toggle case of a line.
• i select in, a select around:
  • b, (, ) parenthesis
  • B, {, } brace
  • t tag
  • p paragraph
• / regexp can be used in the query
  • \< \> match exact word
  • * search word at point
  • c g n change next match
    • This requires the evil-search-module to be evil-search.
• m mark current position, ' goto the marked line, ` goto the marked position
  • The marks are added to the jumplist.
• Jumplist
  • Show with :jumps
  • C-SPC creates the jump point as well
• [ ', ]' previous and next mark line, [`, ]` previous and next mark
• [(, ]) previous open and next close paranthesis, [{, ]} previous open and next close brace
• [[, ]] backward section begin and forward section end, [], ][ backward section end and forward section begin
• [s, ]s previous and next flyspell error
• ! shell command, !! shell command again on the same region (:.!)
• z scroll
  • b this line to the bottom, t this line to the top, z this line to the center, + bottom line to top, ^ top line to bottom
  • l scroll right, h scroll left.
• z fold
  • c close one, m close all, o open one, r open all, O open subtree, a toggle
• C-y scroll down a line, C-e scroll up a line.
• g d go to definition
• Q (Vim only) enter ex (ed extended) mode
• Z
  • Q quit without saving
  • Z save and quit

• v visual mode, V visual line mode <Vl>, C-v visual block mode <Vb>
• Line based commands such as I, A can be entered after a region is selected.
• g v select the previous selected region in visual mode
• o to select in the other direction
• '<,'> indicates a line in a selected region.
• ! can be called on the region, using it as the standard input.

• most of the motion keys still words
• z, Z the two character evil-sniper

• C-r insert from a register
  • = put the result of simple calculator
• C-w delete a word backward, C-h delete a character
• C-o run a normal mode command
• C-p, C-n complete from previous or next text
• C-x Completion mode (only in Vim)
  • C-] tag completion from the ctags
  • C-f file completion
  • C-p, C-n context-aware local completion from previous or next text
  • C-l context-aware line completion
  • complete variable is used to determine where to look for completion
• C-v insert special characters, such as control characters.

• It allows the other program to temporarily override the keybindings.
• But some are reserved
  • hjkltfwb<C-f><C-b><C-u><C-d><RET>{}()=movement, =/?nN search, 123... numbers, v visual mode
  • <C-]> visit the tag under the cursor
  • [] ?

• Every keybindings are removed except <C-z> which toggles the Emacs mode.
• It can be escaped from the other modes by using the escape character \. \ is one-time, <C-z> is persistent.
• Numbers are bound to simply <C-u> [123...]
  • Emacs provide <ESC> 1 and <M-1> to function the same.

• " the last deleted, yanked, or secondary system copied
• . the last manual insert
• + secondary system clipboard
• * primary system clipboard (highlighted text)
• - last deleted text
  • it is also stored in "
• : the last vim command
• % current filename
• = simple calculator
• 0 last yanked text
• 1 … 9 stores the last nine (non-unique) entires that was stored in " , with the latest unique one being 1.

• it enables the C-a C-x inline number manipulation in Vim.
• evil-numbers/inc-at-pt, evil-numbers/dec-at-pt is provided.

• cs<old delimiter><new delimiter>, ds<old delimiter>, ys<motion><new delimiter> to surround.
• S<new delimiter> in visual mode.
• t can represent a HTML tag as a delimiter.
• Open delimiters for spaced delimiter, and close delimiter for tight delimiter.

evil-embrace for custom surrounding pairs.

• evil-leader/set-leader, evil-leader/set-key to customize
• The global-evil-leader-mode needs to be enabled before evil-mode.

• evil-snipe-override-mode override f, t so that it highlights
• evil-snipe-mode add 2-character search s and x
  • It is z and x (exclusive) in the operator state, the small cursor state that waits for the motion.

• it provides additional textobjects for TeX
  • c command
  • e environment
  • m math, M display math
  • d math delimiter
  • s section
  • ; CDLaTeX accent, ^ superscript, _ subscript
  • T table cell
  • q single quote, Q double quote
• mt toggle things
  • [[, ]] section jumping
  • GitHub - iyefrat/evil-tex: Some evil oriented additions to latex document edi…

• gh, gj, gk, gl navigate between elements
• vae select and element, vaR select a subtree
• M-RET insert heading, TAB, g TAB fold/unfold
• M-h, << promote a heading
• M-l, >> demote a heading
• M-S-h, M-S-l, <aR, >aR, M-k, M-j move subtree
• (, ), previous, next table cell, {, } beginning, end of table
• vae select a cell, vaE select row, var select table
• GitHub - Somelauw/evil-org-mode: Supplemental evil-mode keybindings to emacs …

Display the markers in the fringe.

• $0 the final point position.
• $1, …, $9 the tab-stoppable fields
  • {$n:DEFAULT_VALUE} set default
  • $n mirror: Use the same number again to mirror the field.
    • {$n:$(LISP(yas-text))} mirror with transformation: the value of the field n which is represented by yas-text is transformed with Lisp expression.
  • {$n:DEFAULT_VALUE$(LISP(yas-text))} field with transformation: the inserted value is automatically transformed with given Lisp expression.
    • {$n:$$(LISP(yas-text))} is used when there's no default value.
• `LISP` is run as soon as the snippet is expanded, and the result is inserted.
• Yet another snippet extension

yasnippet-snippets and other packages contain the snippets in yasnippet-snippets-dir for yasnippet to use.

Suggest the completion inline within minibuffer.

Interactive do

Suggest the completion inline within minibuffer.

It shows the completion candidates in the minibuffer vertically, similar to Vertico.

• company-jedi, company-auctex, company-bibtex, company-lua

• company-minimum-prefix-length=(Option): The length of string to activate the completion. default to =3.
• company-idle-delay=(Option): The reaction time. default to =0.3?
• company-frontends (Option): The UI part
  • Default to (company-pseudo-tooltip-unless-just-one-frontend company-echo-metadata-frontend company-preview-if-just-one-frontend) (List of Functions)
    • Use (setq VAR '(LIST)) to set it
  • tooltip: inline popup
    • (setq company-format-margin-function #'{company-dot-icons-margin|company-text-icons-margin|company-vscode-{light|dark}-margin})
      • #' is used to quote a function.
      • company-vscode-{light|dark}-margin (Function) uses the VSCode icons in the graphical interface only, showing nothing in the terminal interface.
  • preview: The inline suggestion
  • echo: Mini buffer suggestion
• company-backends (Option): The completion part
  • (company-bbdb company-semantic company-cmake company-capf company-clang company-files (company-dabbrev-code company-gtags company-etags company-keywords) company-oddmuse company-dabbrev)
• company-global-modes (Option): Major modes in which company modes is enabled by global-company-mode (Command).

• scdl soundcloud download
  • Uses the OAuth cookie stored within the browser
• spotify-dl spotify download
  • Use the Client ID and Client Secret issued from the Spotify for Developers.

• DEL or S-SPC previous page, < beginning, > end SPC next page, N and P next/previous article, n and p next/previous unread article
• g show article, h go to article buffer, s search within the article
• TAB open a mail
• d, D mark as read and move forward/backward
• o save article, C-o save article mail
• ! tick forward, @ mark article
• k kill, C-k kill same subject
• c catchup and exit
• r reply, f followup, m mail in new buffer
• | shell command on article buffer
• t toggle the full mail header
• Group Mode
  • c catchup current
  • g get new news
• Article Mode
  • C-d next keyword, TAB next link
  • s or h go to summary buffer