Here is a list of all related documentation pages:

Absolute axes	Devices with absolute axes are those that send positioning data for an axis in a device-specific coordinate range, defined by a minimum and a maximum value
Clickpad software button behavior	Clickpad is the name given to touchpads without physical buttons below the touchpad
Static device configuration via udev	Libinput supports some static configuration through udev properties
Normalization of relative motion	Most relative input devices generate input in so-called "mickeys"
Palm detection	Palm detection tries to identify accidental touches while typing
Scrolling	Libinput supports three different types of scrolling behavior
Seats	Each device in libinput is assigned to one seat
Lenovo *40 series touchpad support	The Lenovo *40 series emulates trackstick buttons on the top part of the touchpads
Tap-to-click behaviour	"Tapping" or "tap-to-click" is the name given to the behavior where a short finger touch down/up sequence maps into a button click