An easy to use tool to change the mapping of your input device buttons.
Supports mice, keyboards, gamepads, X11, Wayland, combined buttons and programmable macros.
Allows mapping non-keyboard events (click, joystick, wheel) to keys of keyboard devices.

Usage - Macros - Installation - Development - Screenshots - Examples

pacaur -S key-mapper-git

Get a .deb file from the release page or install the latest changes via:

sudo apt install git python3-setuptools gettext
git clone https://github.com/sezanzeb/key-mapper.git
cd key-mapper && ./scripts/build.sh
sudo apt install ./dist/key-mapper-1.2.1.deb

key-mapper is now part of Debian Testing

sudo pip install --no-binary :all: git+https://github.com/sezanzeb/key-mapper.git
sudo systemctl enable key-mapper
sudo systemctl restart key-mapper

If it doesn't seem to install, you can also try sudo python3 setup.py install