Tags: [i3][touchpad]
Cody Craven made an excellent blogpost explaining very clearly how to enable tap to click on i3.
That worked perfectly on my Lenovo T490s with Ubuntu 21.10 and i3 4.20. The TL;DR is directly copied from Cody's post and I keep it here only because it will be easy for me to find it back.
The different available options are listed with [man libinput](# http://manpages.ubuntu.com/manpages/xenial/man4/libinput.4.html)
sudo mkdir -p /etc/X11/xorg.conf.d
sudo tee <<'EOF' /etc/X11/xorg.conf.d/90-touchpad.conf 1> /dev/null
Section "InputClass"
Identifier "touchpad"
MatchIsTouchpad "on"
Driver "libinput"
Option "Tapping" "on"
Option "NaturalScrolling" "on"
Option "ScrollMethod" "twofinger"
Option "TappingDrag" "on"
Option "TappingDragLock" "on"
Option "DisableWhileTyping" "on"
EndSection
EOF