Difference between revisions of "Xmodmap"

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{{Lowercase title}}
 
[[Category:Keyboards]]
 
[[Category:Keyboards]]
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[[Category:X Server]]
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[[Category:X server]]
 
[[de:Xmodmap]]
 
[[de:Xmodmap]]
 
[[fr:Xmodmap]]
 
[[fr:Xmodmap]]
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[[zh-CN :Xmodmap]]
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[[ja:Xmodmap]]
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{{Article summary start}}
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[[ru:Xmodmap]]
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{{Article summary text|A general overview of modifying keymaps and pointer mappings with xmodmap.}}
+
[[zh-CN:Xmodmap]]
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{{Article summary heading|Related}}
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{{Related articles start}}
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{{Article summary wiki|Xorg}}
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{{Related|Xorg}}
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{{Article summary wiki|Extra Keyboard Keys}}
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{{Related|Extra keyboard keys}}
−
{{Article summary wiki|Extra Keyboard Keys in Xorg}}
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{{Related|Extra keyboard keys in Xorg}}
−
{{Article summary wiki|Extra Keyboard Keys in Console}}
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{{Related|Extra keyboard keys in console}}
−
{{Article summary end}}
+
{{Related|Xbindkeys}}
 +
{{Related articles end}}
  
−
'''Xmodmap''' is a utility for modifying keymaps and pointer button mappings in [[Xorg]].
+
''xmodmap'' is a utility for modifying keymaps and pointer button mappings in [[Xorg]].
 +
 
 +
''xmodmap'' is not directly related to [[X KeyBoard extension]] (XKB), as it uses different (pre-XKB) ideas on how ''keycodes'' are processed within X. Generally, it is only recommended for the simplest tasks. See [[X KeyBoard extension]] for advanced layout configuration.
 +
 
 +
{{Note|''xmodmap'' settings are reset by ''setxkbmap'', which not only alters the alphanumeric keys to the values given in the map, but also resets all other keys to the startup default. [http://wiki.linuxquestions.org/wiki/Configuring_keyboards]}}
  
 
== Introduction ==  
 
== Introduction ==  
−
The Linux kernel generates a code each time a key is pressed on a keyboard. That code is compared to a {{ic|table of keycodes}} defining a figure that is then displayed.
 
  
−
This process is complicated by [[Xorg]], which starts its own table of keycodes. Each keycode can belong to a {{ic|keysym}}. A keysym is like a function, started by typing a key. Xmodmap allows you to edit these keycode-keysym relations.
+
There are two types of keyboard values in [[Xorg]]: ''keycodes'' and ''keysyms''.
  
−
{{pkg|xkeycaps}} provides a graphical front-end to xmodmap, you can [[pacman|install]] it from the [[official repositories]].
+
; keycode
 +
: The ''keycode'' is the numeric representation received by the kernel when a key or a mouse button is pressed.
 +
; keysym
 +
: The ''keysym'' is the value assigned to the ''keycode''. For example, pressing {{ic|A}} generates the {{ic|keycode 73}}, which is mapped to the {{ic|keysym 0×61}}, which matches {{ic|A}} in the [[Wikipedia:ASCII|ASCII table]].
 +
: The ''keysyms'' are managed by [[Xorg]] in a table of ''keycodes'' defining the ''keycode''-''keysym'' relations, which is called the [[#Keymap table|keymap table]]. This can be shown by running {{ic|xmodmap}}.
 +
 
 +
== Installation ==
 +
 
 +
''xmodmap'' can be [[pacman|installed]] through the {{Pkg|xorg-xmodmap}} package from the [[official repositories]].
 +
 
 +
Optionally, install {{Pkg|xkeycaps}}, which is a graphical front-end to ''xmodmap''.
  
 
== Keymap table ==
 
== Keymap table ==
 +
 
Print the current keymap table formatted into expressions:
 
Print the current keymap table formatted into expressions:
−
{{hc|$ xmodmap -pke|2=keycode  57 = n N}}
 
  
−
Each keymap is followed by the {{Ic|keysyms}} it is mapped to. The above example indicates that the keycode {{ic|57}} is mapped to the lowercase ''n'', while the uppercase ''N'' is mapped to keycode {{Ic|57}} and {{Ic|Shift}}.
+
{{hc|$ xmodmap -pke|2=
 +
[...]
 +
keycode 57 = n N
 +
[...]
 +
}}
  
−
Each keysym column in the table corresponds to a particular key combination:
+
Each ''keycode'' is followed by the ''keysym'' it is mapped to. The above example indicates that the ''keycode'' {{ic|57}} is mapped to the lowercase {{ic|n}}, while the uppercase {{ic|N}} is mapped to ''keycode'' {{ic|57}} plus {{ic|Shift}}.
−
# {{Keypress|Key}}
+
−
# {{Keypress|Shift+Key}}
+
−
# {{Keypress|mode_switch+Key}}
+
−
# {{Keypress|mode_switch+Shift+Key}}
+
−
# {{Keypress|AltGr+Key}}
+
−
# {{Keypress|AltGr+Shift+Key}}
+
  
−
Not all keysyms have to be set, but if you want to assign a latter keysym without assigning earlier ones set them to {{ic|NoSymbol}}.
+
Each ''keysym'' column in the table corresponds to a particular combination of modifier keys:
 +
# {{ic|Key}}
 +
# {{ic|Shift+Key}}
 +
# {{ic|mode_switch+Key}}
 +
# {{ic|mode_switch+Shift+Key}}
 +
# {{ic|AltGr+Key}}
 +
# {{ic|AltGr+Shift+Key}}
  
−
You can check which keymap corresponds to a key on your keyboard with [[Extra Keyboard Keys#Using xev|xev]].
+
Not all ''keysyms'' have to be set, but to assign only a latter ''keysym'', use the {{ic|NoSymbol}} value.
  
−
{{tip|There are predefined descriptive keycodes that make mapping additional keys easier (e.g. {{ic|XF86AudioMute}}, {{ic|XF86Mail}}). Those keycodes can be found in: {{ic|/usr/include/X11/XF86keysym.h}}}}
+
To see which ''keycode'' corresponds to a key, see [[Extra keyboard keys#In Xorg]] for details on the ''xev'' utility which will output relevant keycode/keysym information about a key when you press it.
 +
 
 +
{{Tip|There are predefined descriptive ''keysyms'' for multimedia keys, e.g. {{ic|XF86AudioMute}} or {{ic|XF86Mail}}. These ''keysyms'' can be found in {{ic|/usr/include/X11/XF86keysym.h}}. Many multimedia programs are designed to work with these ''keysyms'' out-of-the-box, without the need to configure any third-party application.
 +
}}
 +
 
 +
Note that xmodmap is influenced by xkbd settings, so all eight keysym are available for the us(intl) xkbd layout but not for the default us (it is missing the ralt_switch symbol defined in level3). To have all 8 keysyms available you should configure the ''(intl)'' variant of the keyboard from xorg.conf or add, using us layout as an example, {{ic|setxkbmap -layout 'us(intl)'}} before calling xmodmap.
  
 
== Custom table ==
 
== Custom table ==
−
You can create your own map and store it in your home directory (i.e. {{ic|~/.Xmodmap}}). Print the current keymap table into a configuration file:
 
−
xmodmap -pke > ~/.Xmodmap
 
  
−
Make the desired changes to {{ic|~/.Xmodmap}} and then test the new configuration with:
+
To create a key map (i.e. {{ic|~/.Xmodmap}}):
−
  xmodmap ~/.Xmodmap
+
  $ xmodmap -pke > ~/.Xmodmap
  
−
{{Accuracy|Some desktop environments such as [[GNOME]] should automatically detect the file and ask you if you want to use it.}}
+
To test the changes:
 +
$ xmodmap ~/.Xmodmap
  
−
To activate your custom table when starting Xorg add the following:
+
=== Activating the custom table ===
−
{{hc|~/.xinitrc|
+
 
−
if [ -s ~/.Xmodmap ]; then
+
With [[GDM]], [[XDM]], [[KDM]] or [[LightDM]] there is no need to source {{ic|~/.Xmodmap}}. For [[startx]], use:
−
    xmodmap ~/.Xmodmap
+
 
−
fi}}
+
{{hc|~/.xinitrc|<nowiki>
 +
[[ -f ~/.Xmodmap ]] && xmodmap ~/.Xmodmap
 +
</nowiki>}}
  
 
Alternatively, edit the global startup script {{ic|/etc/X11/xinit/xinitrc}}.
 
Alternatively, edit the global startup script {{ic|/etc/X11/xinit/xinitrc}}.
  
 
=== Test changes ===
 
=== Test changes ===
−
You can also make temporary changes for the current session. For example:
 
−
xmodmap -e "keycode  46 = l L l L lstroke Lstroke lstroke"
 
−
xmodmap -e "keysym a = e E"
 
  
−
== Special keys/signals ==
+
To make temporary changes:
 +
$ xmodmap -e "keycode  46 = l L l L lstroke Lstroke lstroke"
 +
$ xmodmap -e "keysym a = e E"
 +
 
 +
== Modifier keys ==
 +
 
 +
''xmodmap'' can also be used to override [[Wikipedia:Modifier key|modifier keys]], e.g. to swap {{ic|Control}} and {{ic|Super}} (the [[Wikipedia:Windows key|Windows keys]]).
 +
 
 +
Before assignment the modifier keys need to be empty. {{ic|!}} is a comment, so only the modifiers {{ic|Control}} and {{ic|Mod4}} get cleared in the following example. Then the ''keysyms'' {{ic|Control_L}}, {{ic|Control_R}}, {{ic|Super_L}} and {{ic|Super_R}} are assigned to the opposite modifier. Assigning both left and right to the same modifier means that both keys are treated the same way.
 +
 
 +
{{hc|~/.Xmodmap|2=
 +
[...]
 +
!clear Shift
 +
!clear Lock
 +
clear Control
 +
!clear Mod1
 +
!clear Mod2
 +
!clear Mod3
 +
clear Mod4
 +
!clear Mod5
 +
!add Shift  = Shift_L Shift_R
 +
!add Lock    = Caps_Lock
 +
add Control = Super_L Super_R
 +
!add Mod1    = Alt_L Alt_R
 +
!add Mod2    = Mode_switch
 +
!add Mod3    =
 +
add Mod4    = Control_L Control_R
 +
!add Mod5    =
 +
}}
 +
 
 +
{{Note|The example assumes that the {{ic|Control_L}} and {{ic|Control_R}} keysyms were assigned to the {{ic|Control}} modifier, and {{ic|Super_L}} and {{ic|Super_R}} keysyms to the {{ic|Mod4}} modifier. If you get the following error message {{ic|X Error of failed request:  BadValue (integer parameter out of range for operation)}}, you will need to adapt accordingly. Running {{ic|xmodmap}} produces a list of modifiers and keys that are assigned to them.}}
 +
 
 +
The following example modifies {{ic|CapsLock}} to {{ic|Control}}, and {{ic|Shift+CapsLock}} to {{ic|CapsLock}}:
 +
{{hc|~/.Xmodmap|2=
 +
clear lock
 +
clear control
 +
add control = Caps_Lock Control_L Control_R
 +
keycode 66 = Control_L Caps_Lock NoSymbol NoSymbol
 +
}}
 +
 
 +
== Reverse scrolling ==
 +
 
 +
{{Merge|Mouse buttons|xmodmap is not the only way to do this.}}
 +
 
 +
The [http://who-t.blogspot.com/2011/09/natural-scrolling-in-synaptics-driver.html natural scrolling] feature available in OS X Lion (mimicking smartphone or tablet scrolling) can be [https://bbs.archlinux.org/viewtopic.php?id=126258 replicated] with ''xmodmap''. Since the synaptics driver uses the buttons 4/5/6/7 for up/down/left/right scrolling, you simply need to swap the order of how the buttons are declared in {{ic|~/.Xmodmap}}:
 +
 
 +
{{hc|~/.Xmodmap|2=
 +
pointer = 1 2 3 '''5 4''' 7 6 8 9 10 11 12
 +
}}
 +
 
 +
Then update ''xmodmap'':
 +
$ xmodmap ~/.Xmodmap
 +
 
 +
== Swapping mouse buttons ==
 +
 
 +
{{Merge|Mouse buttons|xmodmap is not the only way to do this.}}
 +
 
 +
The left, middle and right mouse buttons correspond to buttons 1,2 and 3 respectively in the synaptics driver. To swap left and right mouse buttons, again simply reverse the order in which they are listed in your {{ic|~/.Xmodmap}}:
 +
 
 +
{{hc|~/.Xmodmap|2=
 +
pointer = '''3 2 1'''
 +
}}
 +
 
 +
This should suffice for a simple mouse setup. Again, update ''xmodmap'':
 +
$ xmodmap ~/.Xmodmap
  
−
You can also also edit the keys: {{Keypress|Shift}}, {{Keypress|Ctrl}}, {{Keypress|Alt}} and {{Keypress|Super}} (there always exists a left and a right one (Alt_R=AltGr)).
+
== Templates ==
  
−
For example this can be useful if your right Control key is not working like your left one but you would like it to.
+
=== Spanish ===
  
−
At first you have to delete/clear the signals that should be edited. In the beginning of your {{ic|~/.Xmodmap}}:
+
{{hc|~/.Xmodmap|
−
  !clear Shift
+
keycode 24 &#61; a A aacute Aacute ae AE ae
−
  !clear Lock
+
keycode 26 &#61; e E eacute Eacute EuroSign cent EuroSign
−
  clear Control
+
keycode 30 &#61; u U uacute Uacute downarrow uparrow downarrow
−
  !clear Mod1
+
keycode 31 &#61; i I iacute Iacute rightarrow idotless rightarrow
−
  !clear Mod2
+
keycode 32 &#61; o O oacute Oacute oslash Oslash oslash
−
  !clear Mod3
+
keycode 57 &#61; n N ntilde Ntilde n N n
−
  clear Mod4
+
keycode 58 &#61; comma question comma questiondown dead_acute dead_doubleacute dead_acute
−
  !clear Mod5
+
keycode 61 &#61; exclam section exclamdown section dead_belowdot dead_abovedot dead_belowdot
−
keycode   8 =
+
!Maps the Mode key to the Alt key
−
...
+
keycode 64 &#61; Mode_switch
−
Remember, {{ic|!}} is a comment so only {{Keypress|Control}} and {{Keypress|Mod4}} (Standard: Super_L Super_R) get cleared.
+
}}
  
−
Write the new signals at the end of {{ic|~/.Xmodmap}}
+
=== Turn CapsLock into Control ===
−
keycode 255 =
+
−
!add Shift  = Shift_L Shift_R
+
−
!add Lock    = Caps_Lock
+
−
add Control = Super_L Super_R
+
−
!add Mod1    = Alt_L Alt_R
+
−
!add Mod2    = Mode_switch
+
−
!add Mod3    =
+
−
add Mod4    = Control_L Control_R
+
−
!add Mod5    =
+
−
The {{Keypress|Super}} keys have now been exchanged with the {{Keypress|Ctrl}} keys.
+
  
−
If you get the following error message {{ic|X Error of failed request:  BadValue (integer parameter out of range for operation)}} it means the key you are trying to add is already in another modifier, so remove it using "remove MODIFIERNAME = KEYSYMNAME". Running {{ic|xmodmap}} gives you a list of modifiers and keys that are assigned to them.
+
Simplest example of changing {{ic|CapsLock}} into {{ic|Control}}.
  
−
== Reverse Scrolling ==
+
{{hc|~/.Xmodmap|<nowiki>
−
The natural scrolling feature available in OS X Lion (mimicking smartphone or tablet scrolling) can be replicated with xmodmap. Since the synaptics driver uses the buttons 4/5/6/7 for up/down/left/right scrolling, you simply need to swap the order of how the buttons are declared in {{ic|~/.Xmodmap}}.
+
clear lock
 +
clear control
 +
keycode 66 = Control_L
 +
add control = Control_L Control_R
 +
</nowiki>}}
  
−
Open {{ic|~/.Xmodmap}} and append the following line to the file:
+
=== Turn CapsLock into Control, and LeftControl into Hyper ===
−
pointer = 1 2 3 5 4 7 6 8 9 10 11 12
+
−
Note how the 4 and 5 have been reversed.
+
  
−
Then update xmodmap:
+
Laptop users may prefer having {{ic|CapsLock}} as {{ic|Control}}. The {{ic|Left Hyper}} key can be used as a modifier.
−
xmodmap ~/.Xmodmap
+
  
−
To return to regular scrolling simply reverse the order of the 4 and 5 or delete the line altogether. For more information check Peter Hutterer's post, [http://who-t.blogspot.com/2011/09/natural-scrolling-in-synaptics-driver.html Natural scrolling in the synaptics driver], or the [https://bbs.archlinux.org/viewtopic.php?id=126258 Reverse scrolling direction ala Mac OS X Lion?] forum thread.
+
{{hc|~/.Xmodmap|<nowiki>
 +
clear      lock
 +
clear  control
 +
clear      mod1
 +
clear      mod2
 +
clear      mod3
 +
clear      mod4
 +
clear      mod5
 +
keycode      37 = Hyper_L
 +
keycode      66 = Control_L
 +
add    control = Control_L Control_R
 +
add        mod1 = Alt_L Alt_R Meta_L
 +
add        mod2 = Num_Lock
 +
add        mod3 = Hyper_L
 +
add        mod4 = Super_L Super_R
 +
add        mod5 = Mode_switch ISO_Level3_Shift
 +
</nowiki>}}
  
−
== Accents on US keyboards ==
+
=== Switch every number key N with Shift-N and vice-versa, for Croatian layout ===
  
−
The following is an example configuration:
+
Should work fine for layouts similar to Croatian as well.
−
+
−
AltGr + e -> é
+
−
AltGr + r -> è
+
−
AltGr + a -> à
+
−
AltGr + u -> ù
+
−
AltGr + i -> ì
+
−
AltGr + o -> ò
+
−
AltGr + c -> ç
+
−
AltGr + [ -> «
+
−
AltGr + ] -> »
+
−
AltGr + ; -> dead diaresis (ï, ü, etc.)
+
−
AltGr + 6 -> dead circumflex (î, ê, etc.)
+
  
−
This is an xmodmap file which remaps keys to match the above example.
+
{{hc|~/.Xmodmap|<nowiki>
 +
keycode 10 = exclam 1 1 exclam asciitilde dead_tilde asciitilde
 +
keycode 11 = quotedbl 2 2 quotedbl dead_caron caron dead_caron
 +
keycode 12 = numbersign 3 3 numbersign asciicircum dead_circumflex asciicircum
 +
keycode 13 = dollar 4 4 dollar dead_breve breve dead_breve
 +
keycode 14 = percent 5 5 percent degree dead_abovering degree
 +
keycode 15 = ampersand 6 6 ampersand dead_ogonek ogonek dead_ogonek
 +
keycode 16 = slash 7 7 slash grave dead_grave grave
 +
keycode 17 = parenleft 8 8 parenleft dead_abovedot abovedot dead_abovedot
 +
keycode 18 = parenright 9 9 parenright dead_acute apostrophe dead_acute
 +
keycode 19 = equal 0 0 equal dead_doubleacute doubleacute dead_doubleacute
 +
</nowiki>}}
  
−
clear Mod1
+
== See also ==
−
clear Mod2
+
−
!  us.map with a few redefinitions
+
−
keycode  9 = Escape Escape
+
−
keycode  10 = 1 exclam
+
−
keycode  11 = 2 at at
+
−
keycode  12 = 3 numbersign
+
−
keycode  13 = 4 dollar dollar
+
−
keycode  14 = 5 percent currency
+
−
keycode  15 = 6 asciicircum dead_circumflex
+
−
keycode  16 = 7 ampersand braceleft
+
−
keycode  17 = 8 asterisk bracketleft
+
−
keycode  18 = 9 parenleft bracketright
+
−
keycode  19 = 0 parenright braceright
+
−
keycode  20 = minus underscore backslash
+
−
keycode  21 = equal plus
+
−
keycode  22 = BackSpace Delete
+
−
keycode  23 = Tab Tab
+
−
keycode  24 = q
+
−
keycode  25 = w
+
−
keycode  26 = e E eacute
+
−
keycode  27 = r R egrave
+
−
keycode  28 = t
+
−
keycode  29 = y
+
−
keycode  30 = u U ugrave
+
−
keycode  31 = i I igrave
+
−
keycode  32 = o O ograve
+
−
keycode  33 = p
+
−
keycode  34 = bracketleft braceleft guillemotleft
+
−
keycode  35 = bracketright braceright guillemotright
+
−
keycode  36 = Return
+
−
keycode  37 = Control_L
+
−
keycode  38 = a A agrave
+
−
keycode  39 = s
+
−
keycode  40 = d
+
−
keycode  41 = f
+
−
keycode  42 = g
+
−
keycode  43 = h
+
−
keycode  44 = j
+
−
keycode  45 = k
+
−
keycode  46 = l
+
−
keycode  47 = semicolon colon dead_diaeresis
+
−
keycode  48 = apostrophe quotedbl
+
−
keycode  49 = grave asciitilde dead_grave
+
−
keycode  50 = Shift_L
+
−
keycode  51 = backslash bar
+
−
keycode  52 = z
+
−
keycode  53 = x
+
−
keycode  54 = c C ccedilla
+
−
keycode  55 = v
+
−
keycode  56 = b
+
−
keycode  57 = n
+
−
keycode  58 = m
+
−
keycode  59 = comma less apostrophe
+
−
keycode  60 = period greater quotedbl
+
−
keycode  61 = slash question
+
−
keycode  62 = Shift_R
+
−
keycode  63 = KP_Multiply
+
−
keycode  64 = Alt_L Meta_L
+
−
keycode  65 = space space
+
−
keycode  66 = Caps_Lock
+
−
keycode  67 = F1 F11
+
−
keycode  68 = F2 F12
+
−
keycode  69 = F3 F13
+
−
keycode  70 = F4 F14
+
−
keycode  71 = F5 F15
+
−
keycode  72 = F6 F16
+
−
keycode  73 = F7 F17
+
−
keycode  74 = F8 F18
+
−
keycode  75 = F9 F19
+
−
keycode  76 = F10 F20
+
−
keycode  77 = Num_Lock
+
−
keycode  78 = Scroll_Lock
+
−
keycode  79 = KP_7
+
−
keycode  80 = KP_8
+
−
keycode  81 = KP_9
+
−
keycode  82 = KP_Subtract
+
−
keycode  83 = KP_4
+
−
keycode  84 = KP_5
+
−
keycode  85 = KP_6
+
−
keycode  86 = KP_Add
+
−
keycode  87 = KP_1
+
−
keycode  88 = KP_2
+
−
keycode  89 = KP_3
+
−
keycode  90 = KP_0
+
−
keycode  94 = less greater bar
+
−
keycode  95 = F11 F11
+
−
keycode  96 = F12 F12
+
−
keycode 108 = KP_Enter
+
−
keycode 109 = Control_R
+
−
keycode 112 = KP_Divide
+
−
keycode 113 = Mode_switch
+
−
keycode 114 = Break
+
−
keycode 110 = Find
+
−
keycode  98 = Up
+
−
keycode  99 = Prior
+
−
keycode 100 = Left
+
−
keycode 102 = Right
+
−
keycode 115 = Select
+
−
keycode 104 = Down
+
−
keycode 105 = Next
+
−
keycode 106 = Insert
+
−
keycode 116 = Mode_switch
+
−
! right windows-menu key, redefined as Compose key
+
−
keycode 117 = Multi_key
+
−
add Mod1 = Alt_L
+
−
add Mod2 = Mode_switch
+
  
−
== Additional resources ==
 
 
*[http://www.x.org/archive/current/doc/man/man1/xmodmap.1.xhtml Current man page] at X.Org Foundation
 
*[http://www.x.org/archive/current/doc/man/man1/xmodmap.1.xhtml Current man page] at X.Org Foundation
 
*[http://cweiske.de/howto/xmodmap/allinone.html Multimediakeys with .Xmodmap HOWTO] by Christian Weiske
 
*[http://cweiske.de/howto/xmodmap/allinone.html Multimediakeys with .Xmodmap HOWTO] by Christian Weiske
 
*[http://dev-loki.blogspot.com/2006/04/mapping-unsupported-keys-with-xmodmap.html Mapping unsupported keys with xmodmap] by Pascal Bleser
 
*[http://dev-loki.blogspot.com/2006/04/mapping-unsupported-keys-with-xmodmap.html Mapping unsupported keys with xmodmap] by Pascal Bleser
−
*[http://en.gentoo-wiki.com/wiki/Multimedia_Keys Multimedia Keys article] on the [http://en.gentoo-wiki.com/ Gentoo Wiki]
 
−
*[http://keytouch.sourceforge.net/howto_keyboard/node4.html How to retrieve scancodes] by Marvin Raaijmakers
 
 
*[http://wiki.linuxquestions.org/wiki/List_of_Keysyms_Recognised_by_Xmodmap List of Keysyms Recognised by Xmodmap] on [http://linuxquestions.org LinuxQuestions]
 
*[http://wiki.linuxquestions.org/wiki/List_of_Keysyms_Recognised_by_Xmodmap List of Keysyms Recognised by Xmodmap] on [http://linuxquestions.org LinuxQuestions]

Latest revision as of 08:59, 2 August 2016

xmodmap is a utility for modifying keymaps and pointer button mappings in Xorg.

xmodmap is not directly related to X KeyBoard extension (XKB), as it uses different (pre-XKB) ideas on how keycodes are processed within X. Generally, it is only recommended for the simplest tasks. See X KeyBoard extension for advanced layout configuration.

Note: xmodmap settings are reset by setxkbmap, which not only alters the alphanumeric keys to the values given in the map, but also resets all other keys to the startup default. [1]

Introduction

There are two types of keyboard values in Xorg: keycodes and keysyms.

keycode
The keycode is the numeric representation received by the kernel when a key or a mouse button is pressed.
keysym
The keysym is the value assigned to the keycode. For example, pressing A generates the keycode 73, which is mapped to the keysym 0×61, which matches A in the ASCII table.
The keysyms are managed by Xorg in a table of keycodes defining the keycode-keysym relations, which is called the keymap table. This can be shown by running xmodmap.

Installation

xmodmap can be installed through the xorg-xmodmap package from the official repositories.

Optionally, install xkeycaps, which is a graphical front-end to xmodmap.

Keymap table

Print the current keymap table formatted into expressions: 

$ xmodmap -pke
[...]
keycode  57 = n N
[...]

Each keycode is followed by the keysym it is mapped to. The above example indicates that the keycode 57 is mapped to the lowercase n, while the uppercase N is mapped to keycode 57 plus Shift.

Each keysym column in the table corresponds to a particular combination of modifier keys:

  1. Key
  2. Shift+Key
  3. mode_switch+Key
  4. mode_switch+Shift+Key
  5. AltGr+Key
  6. AltGr+Shift+Key

Not all keysyms have to be set, but to assign only a latter keysym, use the NoSymbol value.

To see which keycode corresponds to a key, see Extra keyboard keys#In Xorg for details on the xev utility which will output relevant keycode/keysym information about a key when you press it.

Tip: There are predefined descriptive keysyms for multimedia keys, e.g. XF86AudioMute or XF86Mail. These keysyms can be found in /usr/include/X11/XF86keysym.h. Many multimedia programs are designed to work with these keysyms out-of-the-box, without the need to configure any third-party application.

Note that xmodmap is influenced by xkbd settings, so all eight keysym are available for the us(intl) xkbd layout but not for the default us (it is missing the ralt_switch symbol defined in level3). To have all 8 keysyms available you should configure the (intl) variant of the keyboard from xorg.conf or add, using us layout as an example, setxkbmap -layout 'us(intl)' before calling xmodmap.

Custom table

To create a key map (i.e. ~/.Xmodmap): 

$ xmodmap -pke > ~/.Xmodmap

To test the changes: 

$ xmodmap ~/.Xmodmap

Activating the custom table

With GDM, XDM, KDM or LightDM there is no need to source ~/.Xmodmap. For startx, use: 

~/.xinitrc
[[ -f ~/.Xmodmap ]] && xmodmap ~/.Xmodmap

Alternatively, edit the global startup script /etc/X11/xinit/xinitrc.

Test changes

To make temporary changes: 

$ xmodmap -e "keycode  46 = l L l L lstroke Lstroke lstroke"
$ xmodmap -e "keysym a = e E"

Modifier keys

xmodmap can also be used to override modifier keys, e.g. to swap Control and Super (the Windows keys).

Before assignment the modifier keys need to be empty. ! is a comment, so only the modifiers Control and Mod4 get cleared in the following example. Then the keysyms Control_L, Control_R, Super_L and Super_R are assigned to the opposite modifier. Assigning both left and right to the same modifier means that both keys are treated the same way. 

~/.Xmodmap
[...]
!clear Shift
!clear Lock
clear Control
!clear Mod1
!clear Mod2
!clear Mod3
clear Mod4
!clear Mod5
!add Shift   = Shift_L Shift_R
!add Lock    = Caps_Lock
add Control = Super_L Super_R
!add Mod1    = Alt_L Alt_R
!add Mod2    = Mode_switch
!add Mod3    =
add Mod4    = Control_L Control_R
!add Mod5    =
Note: The example assumes that the Control_L and Control_R keysyms were assigned to the Control modifier, and Super_L and Super_R keysyms to the Mod4 modifier. If you get the following error message X Error of failed request: BadValue (integer parameter out of range for operation), you will need to adapt accordingly. Running xmodmap produces a list of modifiers and keys that are assigned to them.

The following example modifies CapsLock to Control, and Shift+CapsLock to CapsLock: 

~/.Xmodmap
clear lock
clear control
add control = Caps_Lock Control_L Control_R
keycode 66 = Control_L Caps_Lock NoSymbol NoSymbol

Reverse scrolling

Merge-arrows-2.pngThis article or section is a candidate for merging with Mouse buttons.Merge-arrows-2.png

Notes: xmodmap is not the only way to do this. (Discuss in Talk:Xmodmap#)

The natural scrolling feature available in OS X Lion (mimicking smartphone or tablet scrolling) can be replicated with xmodmap. Since the synaptics driver uses the buttons 4/5/6/7 for up/down/left/right scrolling, you simply need to swap the order of how the buttons are declared in ~/.Xmodmap: 

~/.Xmodmap
pointer = 1 2 3 5 4 7 6 8 9 10 11 12

Then update xmodmap: 

$ xmodmap ~/.Xmodmap

Swapping mouse buttons

Merge-arrows-2.pngThis article or section is a candidate for merging with Mouse buttons.Merge-arrows-2.png

Notes: xmodmap is not the only way to do this. (Discuss in Talk:Xmodmap#)

The left, middle and right mouse buttons correspond to buttons 1,2 and 3 respectively in the synaptics driver. To swap left and right mouse buttons, again simply reverse the order in which they are listed in your ~/.Xmodmap: 

~/.Xmodmap
pointer = 3 2 1

This should suffice for a simple mouse setup. Again, update xmodmap: 

$ xmodmap ~/.Xmodmap

Templates

Spanish

~/.Xmodmap
keycode  24 = a A aacute Aacute ae AE ae
keycode  26 = e E eacute Eacute EuroSign cent EuroSign
keycode  30 = u U uacute Uacute downarrow uparrow downarrow
keycode  31 = i I iacute Iacute rightarrow idotless rightarrow
keycode  32 = o O oacute Oacute oslash Oslash oslash
keycode  57 = n N ntilde Ntilde n N n
keycode  58 = comma question comma questiondown dead_acute dead_doubleacute dead_acute
keycode  61 = exclam section exclamdown section dead_belowdot dead_abovedot dead_belowdot
!Maps the Mode key to the Alt key
keycode 64 = Mode_switch

Turn CapsLock into Control

Simplest example of changing CapsLock into Control. 

~/.Xmodmap
clear lock
clear control
keycode 66 = Control_L
add control = Control_L Control_R

Turn CapsLock into Control, and LeftControl into Hyper

Laptop users may prefer having CapsLock as Control. The Left Hyper key can be used as a modifier. 

~/.Xmodmap
clear      lock 
clear   control
clear      mod1
clear      mod2
clear      mod3
clear      mod4
clear      mod5
keycode      37 = Hyper_L
keycode      66 = Control_L
add     control = Control_L Control_R
add        mod1 = Alt_L Alt_R Meta_L
add        mod2 = Num_Lock
add        mod3 = Hyper_L
add        mod4 = Super_L Super_R
add        mod5 = Mode_switch ISO_Level3_Shift

Switch every number key N with Shift-N and vice-versa, for Croatian layout

Should work fine for layouts similar to Croatian as well. 

~/.Xmodmap
keycode 10 = exclam 1 1 exclam asciitilde dead_tilde asciitilde
keycode 11 = quotedbl 2 2 quotedbl dead_caron caron dead_caron
keycode 12 = numbersign 3 3 numbersign asciicircum dead_circumflex asciicircum
keycode 13 = dollar 4 4 dollar dead_breve breve dead_breve
keycode 14 = percent 5 5 percent degree dead_abovering degree
keycode 15 = ampersand 6 6 ampersand dead_ogonek ogonek dead_ogonek
keycode 16 = slash 7 7 slash grave dead_grave grave
keycode 17 = parenleft 8 8 parenleft dead_abovedot abovedot dead_abovedot
keycode 18 = parenright 9 9 parenright dead_acute apostrophe dead_acute
keycode 19 = equal 0 0 equal dead_doubleacute doubleacute dead_doubleacute

See also

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