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====== XmodMap ======
All the funny things you can do using the ''xmodmap'' command.

===== Mapping Umlauts =====
Though I'm german, I prefer US-layout for my keyboards. This is mainly for two reasons:
  * intensive use of Alt_R leads to worn out joints of my right hand's thumb
  * umlauts weren't working for me in the past anyway.
Since I fixed my earlier problems using umlauts, I now want to at least be able to type them,
still using my preferred keyboard layout. This is how I made that possible:

Using ''xev'', I had to find out some things:
  * the Alt_R key has the keycode 113
  * keycodes for a, o, u and s are 38, 32, 30 and 39

The nice command ''dumpkeys -l'' shows you the currently available keysyms. It showed me that:
  * the umlauted a, o and u are being called ''adiaeresis'', ''odiaeresis'' and ''udiaeresis'' and
  * the sharp s is being called ''ssharp''.

Now let's do it:

a first entry in //.Xmodmap//:
<file>
keycode 113 = Mode_switch Alt_R
</file>
sets the functionality of the Alt_R key (keycode 113) to ''Mode_switch'' by default. When being used
shifted, the old functionality is restored.

First a short usage of the ''keycode'' statement of //.Xmodmap//:
  keycode CODE = KEY_NORMAL KEY_SHIFTED KEY_MODIFIED KEY_SHIFTED_MODIFIED
placeholder naming should be self-explanatory.

Putting the above together, we can remap a, o, u and s:
<file>
keycode 38 = a A adiaeresis Adiaeresis
keycode 32 = o O odiaeresis Odiaeresis
keycode 30 = u U udiaeresis Udiaeresis
keycode 39 = s S ssharp 
</file>
that's it.

===== Home Made Swapcaps =====
Of course, also Caps_lock and Control can be swapped using ''xmodmap'':
<file>
remove Lock = Caps_Lock
remove Control = Control_R
keysym Control_R = Caps_Lock
keysym Caps_Lock = Control_R
add Lock = Caps_Lock
add Control = Control_R
</file>
the special feature of this configuration is that Caps_lock is actually swapped
with Control_R, so the original function of the left Ctrl-button is sustained.
<sub>yes, I really have no need for Caps_lock</sub>