https://forum.xfce.org/viewtopic.php?id=11489
https://wiki.archlinux.org/index.php/Touchpad_Synaptics#Advanced_configuration
It's not a Synaptics though...
$ synclient
Couldn't find synaptics properties. No synaptics driver loaded?
$
$ xinput list-props "ETPS/2 Elantech Touchpad" | grep Capabilities
$
hmm...
$ xinput list-props "ETPS/2 Elantech Touchpad"
Device 'ETPS/2 Elantech Touchpad':
Device Enabled (143): 1
Coordinate Transformation Matrix (145): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Tapping Enabled (278): 1
libinput Tapping Enabled Default (279): 0
libinput Tapping Drag Enabled (280): 1
libinput Tapping Drag Enabled Default (281): 1
libinput Tapping Drag Lock Enabled (282): 0
libinput Tapping Drag Lock Enabled Default (283): 0
libinput Tapping Button Mapping Enabled (284): 1, 0
libinput Tapping Button Mapping Default (285): 1, 0
libinput Natural Scrolling Enabled (286): 0
libinput Natural Scrolling Enabled Default (287): 0
libinput Disable While Typing Enabled (288): 1
libinput Disable While Typing Enabled Default (289): 1
libinput Scroll Methods Available (290): 1, 1, 0
libinput Scroll Method Enabled (291): 0, 1, 0
libinput Scroll Method Enabled Default (292): 1, 0, 0
libinput Accel Speed (293): 0.000000
libinput Accel Speed Default (294): 0.000000
libinput Accel Profiles Available (295): 1, 1
libinput Accel Profile Enabled (296): 1, 0
libinput Accel Profile Enabled Default (297): 1, 0
libinput Left Handed Enabled (298): 0
libinput Left Handed Enabled Default (299): 0
libinput Send Events Modes Available (263): 1, 1
libinput Send Events Mode Enabled (264): 0, 0
libinput Send Events Mode Enabled Default (265): 0, 0
Device Node (266): "/dev/input/event8"
Device Product ID (267): 2, 14
libinput Drag Lock Buttons (300): <no items>
libinput Horizontal Scroll Enabled (301): 1
$
No idea what to do with this information, or if it's even useful...