I recently installed Fedora Asahi Remix on my Macbook Air M1 and wanted to swap my alt and command keys, plus rebind my caps-lock key as control. I’m still new to wayland (with plasma6 in this case) so I googled what tools to use and found rvaiya/keyd.

Installation was easy, quoting the project README:

git clone https://github.com/rvaiya/keyd
cd keyd
make && sudo make install
sudo systemctl enable --now keyd

Below is a configuration that Works For Me™:

# /etc/keyd/default.conf
[ids]

*

[main]
capslock = overload(control, capslock)

meta = layer(alt)
leftalt = layer(meta)

We swap alt/command, and we make caps-lock behave like normal when tapped, but when held it acts like a control key.

I’ve seen another configuration which makes caps-lock act like escape when tapped and control otherwise, plus remapping caps-lock to the normal escape key – but I’m not a vim user so not as useful for me.

That setup would look something like this:

[ids]

*

[main]
capslock = overload(control, escape)
escape = capslock

meta = layer(alt)
leftalt = layer(meta)