Key mapping refers to the process of assigning specific functions or actions to different keys on a keyboard or controller. It allows users to customize how their keys work to better suit their preferences or needs. Full definition
It will also support full mouse and keyboard along with custom key mapping. (gamechup.com)
The controls have been fine tuned for the precision of a keyboard (custom key mapping) and mouse support. (pixelatedgamer.com)
Since idioms represent defined phrases, Authors may choose to treat them as search keys, allowing users to find them via lookup (see Example 28 under Search Key Map Documents for details). (idpf.org)