key layout: en_US + german umlauts + special + greek

.XCompose

# ~/.XCompose

# load defaults ( /usr/share/X11/locale/en_US.UTF-8/Compose )
include "%L"

<Multi_key> <g> <A>                        : "Α"   U0391 # GREEK CAPITAL LETTER ALPHA
<Multi_key> <g> <a>                        : "α"   U03B1 # GREEK SMALL LETTER ALPHA
<Multi_key> <g> <B>                        : "Β"   U0392 # GREEK CAPITAL LETTER BETA
<Multi_key> <g> <b>                        : "β"   U03B2 # GREEK SMALL LETTER BETA
<Multi_key> <g> <D>                        : "Δ"   U0394 # GREEK CAPITAL LETTER DELTA
<Multi_key> <g> <d>                        : "δ"   U03B4 # GREEK SMALL LETTER DELTA
<Multi_key> <g> <E>                        : "Ε"   U0395 # GREEK CAPITAL LETTER EPSILON
<Multi_key> <g> <e>                        : "ε"   U03B5 # GREEK SMALL LETTER EPSILON
<Multi_key> <g> <F>                        : "Φ"   U03A6 # GREEK CAPITAL LETTER PHI
<Multi_key> <g> <f>                        : "φ"   U03C6 # GREEK SMALL LETTER PHI
<Multi_key> <g> <G>                        : "Γ"   U0393 # GREEK CAPITAL LETTER GAMMA
<Multi_key> <g> <g>                        : "γ"   U03B3 # GREEK SMALL LETTER GAMMA
<Multi_key> <g> <H>                        : "Η"   U0397 # GREEK CAPITAL LETTER ETA
<Multi_key> <g> <h>                        : "η"   U03B7 # GREEK SMALL LETTER ETA
<Multi_key> <g> <I>                        : "Ι"   U0399 # GREEK CAPITAL LETTER IOTA
<Multi_key> <g> <i>                        : "ι"   U03B9 # GREEK SMALL LETTER IOTA
<Multi_key> <g> <J>                        : "Θ"   U0398 # GREEK CAPITAL LETTER THETA
<Multi_key> <g> <j>                        : "θ"   U03B8 # GREEK SMALL LETTER THETA
<Multi_key> <g> <K>                        : "Κ"   U039A # GREEK CAPITAL LETTER KAPPA
<Multi_key> <g> <k>                        : "κ"   U03BA # GREEK SMALL LETTER KAPPA
<Multi_key> <g> <L>                        : "Λ"   U039B # GREEK CAPITAL LETTER LAMDA
<Multi_key> <g> <l>                        : "λ"   U03BB # GREEK SMALL LETTER LAMDA
<Multi_key> <g> <M>                        : "Μ"   U039C # GREEK CAPITAL LETTER MU
<Multi_key> <g> <m>                        : "μ"   U03BC # GREEK SMALL LETTER MU
<Multi_key> <g> <N>                        : "Ν"   U039D # GREEK CAPITAL LETTER NU
<Multi_key> <g> <n>                        : "ν"   U03BD # GREEK SMALL LETTER NU
<Multi_key> <g> <O>                        : "Ο"   U039F # GREEK CAPITAL LETTER OMICRON
<Multi_key> <g> <o>                        : "ο"   U03BF # GREEK SMALL LETTER OMICRON
<Multi_key> <g> <P>                        : "Π"   U03A0 # GREEK CAPITAL LETTER PI
<Multi_key> <g> <p>                        : "π"   U03C0 # GREEK SMALL LETTER PI
<Multi_key> <g> <Q>                        : "Χ"   U03A7 # GREEK CAPITAL LETTER CHI
<Multi_key> <g> <q>                        : "χ"   U03C7 # GREEK SMALL LETTER CHI
<Multi_key> <g> <R>                        : "Ρ"   U03A1 # GREEK CAPITAL LETTER RHO
<Multi_key> <g> <r>                        : "ρ"   U03C1 # GREEK SMALL LETTER RHO
<Multi_key> <g> <S>                        : "Σ"   U03A3 # GREEK CAPITAL LETTER SIGMA
<Multi_key> <g> <s>                        : "σ"   U03C3 # GREEK SMALL LETTER SIGMA
<Multi_key> <g> <T>                        : "Τ"   U03A4 # GREEK CAPITAL LETTER TAU
<Multi_key> <g> <t>                        : "τ"   U03C4 # GREEK SMALL LETTER TAU
<Multi_key> <g> <U>                        : "Υ"   U03A5 # GREEK CAPITAL LETTER UPSILON
<Multi_key> <g> <u>                        : "υ"   U03C5 # GREEK SMALL LETTER UPSILON
<Multi_key> <g> <W>                        : "Ω"   U03A9 # GREEK CAPITAL LETTER OMEGA
<Multi_key> <g> <w>                        : "ω"   U03C9 # GREEK SMALL LETTER OMEGA
<Multi_key> <g> <X>                        : "Ξ"   U039E # GREEK CAPITAL LETTER XI
<Multi_key> <g> <x>                        : "ξ"   U03BE # GREEK SMALL LETTER XI
<Multi_key> <g> <Y>                        : "Ψ"   U03A8 # GREEK CAPITAL LETTER PSI
<Multi_key> <g> <y>                        : "ψ"   U03C8 # GREEK SMALL LETTER PSI
<Multi_key> <g> <Z>                        : "Ζ"   U0396 # GREEK CAPITAL LETTER ZETA
<Multi_key> <g> <z>                        : "ζ"   U03B6 # GREEK SMALL LETTER ZETA
<Multi_key> <g> <space>                    : "µ"   U00B5 # MICRO SIGN

README.md

This is my setup to add german umlauts and other special characters (in a mapping that makes sense to me, personally) via R_ALT to my en_US layout. It requires keyd to be installed. Also, the compose:menu option must be enabled (setup differs by window manager).

In addition (.XCompose file), I add the greek alphabet via the MENU g <a-Z,space> key sequence.

etc-keyd-default.conf

# /etc/keyd/default.conf

# |main      |ralt      |ralt+shift
#  m          <ctx_menu>
#  a          ä          Ä
#  o          ö          Ö
#  u          ü          Ü
#  s          ß          ẞ
#  q          @
#  x          ×
#  y          ¤
#  e          €
#  p          §
#  r          ®
#  c          ©
#  t          ™
#  i          ⓘ
#  `          º
#  \          †          ‡
#  h          ←          ⇐
#  j          ↓          ⇓
#  k          ↑          ⇑
#  l          →          ⇒
#  ;          »          “
#  '          «          ”
#  ,          ›          „
#  /          ‹
#  .          …          ·
#    (space)    (nbsp)   ­ (shy)
#  -          – (ndash)  — (mdash)
#  =          ≈          ≠
#  [          ≤
#  ]          ≥
#  1          ¹
#  2          ²
#  3          ³
#  4          ⁴
#  5          ⁵          ‰
#  6          ⁶
#  7          ⁷
#  8          ⁸          ∞
#  9          ⁹
#  0          ⁰          ±

# A list of compose sequences can be found in /usr/share/X11/locale/en_US.UTF-8/Compose on most systems.

[ids]
*

[main]

rightalt = layer(diac)

[diac:A]

m = S-f10

## äöüß (shift: ÄÖÜẞ implicit)
a = macro(compose a ")
o = macro(compose o ")
u = macro(compose u ")
s = macro(compose s s)

## @פ€§
q = macro(compose A T)
x = macro(compose x x)
y = macro(compose O X)
e = macro(compose c =)
p = macro(compose S O)

## ®©™ⓘº†
r = macro(compose O R)
c = macro(compose O C)
t = macro(compose T M)
i = macro(compose ( i ))
` = macro(compose ^ _ o)
\ = macro(compose | -)

## ←↓↑→
h = macro(compose < -)
j = macro(compose | v)
k = macro(compose | ^)
l = macro(compose - >)

## »«›‹…<nbsp>
; = macro(compose > >)
' = macro(compose < <)
, = macro(compose . >)
/ = macro(compose . <)
. = macro(compose . .)
space = macro(compose space space)

## –≈≤≥
- = macro(compose - - .)
= = macro(compose ~ ~)
[ = macro(compose < =)
] = macro(compose > =)

## ¹²³⁴⁵⁶⁷⁸⁹⁰
1 = macro(compose ^ 1)
2 = macro(compose ^ 2)
3 = macro(compose ^ 3)
4 = macro(compose ^ 4)
5 = macro(compose ^ 5)
6 = macro(compose ^ 6)
7 = macro(compose ^ 7)
8 = macro(compose ^ 8)
9 = macro(compose ^ 9)
0 = macro(compose ^ 0)

[diac+shift]

## ‡
\ = macro(compose | =)

## ⇐⇓⇑⇒
h = macro(compose = <)
j = macro(compose = v)
k = macro(compose = ^)
l = macro(compose = >)

## “”»·<shy>
; = macro(compose < ")
' = macro(compose > ")
, = macro(compose , ")
. = macro(compose ^ .)
space = macro(compose - - space)

## ѭ䰱
- = macro(compose - - -)
= = macro(compose / =)
5 = macro(compose % o)
8 = macro(compose 8 8)
0 = macro(compose + -)