Xmodmap

Development status	Active
Operating system	Linux, BSD
Type	Utility software
License	GNU General Public License 2

xmodmap is a utility for modifying X Server keymaps and pointer (mouse) button mappings. It can also be used as a tool to display the current keymaps and mouse button mappings as functional within the X Server. An important thing to keep in mind, XModMap "modifies" the current layout. Due to it's design, it cannot completely replace XKB as the ultimate way to set keyboard layouts for X. Adding alternate layers is not possible with xmodmap unless they are previously set with XKB.

XModMap is considerably easier to understand and use than compared to XKB as it is very overwhelming as it has a lot of feature bloat.

Like loadkeys, xmodmap works with a configuration file that specifies all of the keysyms that are to be changed. As well, only the keys that are specified to be changed, are changed. The rest are left as per the previous configuration.

Introduction to XKB

TODO (Needed as xmodmap heavily depends on the state of XKB)