configuring a Wacom tablet on Linux

Hi, apparently the Linuxwacom mailing list disappeared, so maybe someone can help me here.
I have a Wacom Intuos S BT since some time but hardly ever use it. Basically, it works out of the box on Debian 10 (Xfce), but scrolling is not enabled and I would like to assign some keys such as shift, ctrl and alt to some of the buttons of the tablet so I can use it like my touchpad in darktable (e.g. scrolling for changing the size of the pen).
So far I have experimented a little bit with xsetwacom and I was able to change the function of the pen’s buttons, but I kind of cannot figure out how to enable scrolling.
Thanks in advance
b

edit: this is the output for xsetwacom (-s) get:

xfce@anna-pc:~ xsetwacom list devices Wacom Intuos BT S Pen stylus id: 9 type: STYLUS Wacom Intuos BT S Pen eraser id: 10 type: ERASER Wacom Intuos BT S Pen cursor id: 15 type: CURSOR Wacom Intuos BT S Pad pad id: 16 type: PAD xfce@anna-pc:~ xsetwacom -s get Wacom Intuos BT S Pad pad all
Cannot find device ‘Wacom’.
xfce@anna-pc:~ xsetwacom -s get "Wacom Intuos BT S Pad pad" all Property 'Wacom Tablet Area' does not exist on device. xsetwacom set "Wacom Intuos BT S Pad pad" "Button" "1" "button +1 " xsetwacom set "Wacom Intuos BT S Pad pad" "Button" "2" "button +2 " xsetwacom set "Wacom Intuos BT S Pad pad" "Button" "3" "button +3 " xsetwacom set "Wacom Intuos BT S Pad pad" "Button" "8" "button +8 " xsetwacom set "Wacom Intuos BT S Pad pad" "ToolDebugLevel" "0" xsetwacom set "Wacom Intuos BT S Pad pad" "TabletDebugLevel" "0" xsetwacom set "Wacom Intuos BT S Pad pad" "Suppress" "2" xsetwacom set "Wacom Intuos BT S Pad pad" "RawSample" "4" Property 'Wacom Pressurecurve' does not exist on device. xsetwacom set "Wacom Intuos BT S Pad pad" "Mode" "Absolute" Property 'Wacom Hover Click' does not exist on device. xsetwacom set "Wacom Intuos BT S Pad pad" "Touch" "off" Property 'Wacom Hardware Touch Switch' does not exist on device. xsetwacom set "Wacom Intuos BT S Pad pad" "Gesture" "off" xsetwacom set "Wacom Intuos BT S Pad pad" "ZoomDistance" "0" xsetwacom set "Wacom Intuos BT S Pad pad" "ScrollDistance" "0" xsetwacom set "Wacom Intuos BT S Pad pad" "TapTime" "250" Property 'Wacom Proximity Threshold' does not exist on device. Property 'Wacom Rotation' does not exist on device. xsetwacom set "Wacom Intuos BT S Pad pad" "RelWheelUp" "1" "button +5 " xsetwacom set "Wacom Intuos BT S Pad pad" "RelWheelDown" "2" "button +4 " xsetwacom set "Wacom Intuos BT S Pad pad" "AbsWheelUp" "3" "button +4 " xsetwacom set "Wacom Intuos BT S Pad pad" "AbsWheelDown" "4" "button +5 " xsetwacom set "Wacom Intuos BT S Pad pad" "AbsWheel2Up" "5" "button +4 " xsetwacom set "Wacom Intuos BT S Pad pad" "AbsWheel2Down" "6" "button +5 " xsetwacom set "Wacom Intuos BT S Pad pad" "StripLeftUp" "1" "button +4 " xsetwacom set "Wacom Intuos BT S Pad pad" "StripLeftDown" "2" "button +5 " xsetwacom set "Wacom Intuos BT S Pad pad" "StripRightUp" "3" "button +4 " xsetwacom set "Wacom Intuos BT S Pad pad" "StripRightDown" "4" "button +5 " xsetwacom set "Wacom Intuos BT S Pad pad" "Threshold" "0" xsetwacom set "Wacom Intuos BT S Pad pad" "BindToSerial" "0" Property 'Wacom Pressure Recalibration' does not exist on device. xfce@anna-pc:~ xsetwacom -s get “Wacom Intuos BT S Pen stylus” all
xsetwacom set “Wacom Intuos BT S Pen stylus” “Area” “0 0 15200 9500”
xsetwacom set “Wacom Intuos BT S Pen stylus” “Button” “1” "button +1 "
xsetwacom set “Wacom Intuos BT S Pen stylus” “Button” “2” "button +2 "
xsetwacom set “Wacom Intuos BT S Pen stylus” “Button” “3” "button +3 "
xsetwacom set “Wacom Intuos BT S Pen stylus” “Button” “8” "button +8 "
xsetwacom set “Wacom Intuos BT S Pen stylus” “Button” “9” "button +9 "
xsetwacom set “Wacom Intuos BT S Pen stylus” “ToolDebugLevel” “0”
xsetwacom set “Wacom Intuos BT S Pen stylus” “TabletDebugLevel” “0”
xsetwacom set “Wacom Intuos BT S Pen stylus” “Suppress” “2”
xsetwacom set “Wacom Intuos BT S Pen stylus” “RawSample” “4”
xsetwacom set “Wacom Intuos BT S Pen stylus” “PressureCurve” “0 0 100 100”
xsetwacom set “Wacom Intuos BT S Pen stylus” “Mode” “Absolute”
xsetwacom set “Wacom Intuos BT S Pen stylus” “TabletPCButton” “off”
xsetwacom set “Wacom Intuos BT S Pen stylus” “Touch” “off”
Property ‘Wacom Hardware Touch Switch’ does not exist on device.
xsetwacom set “Wacom Intuos BT S Pen stylus” “Gesture” “off”
xsetwacom set “Wacom Intuos BT S Pen stylus” “ZoomDistance” “0”
xsetwacom set “Wacom Intuos BT S Pen stylus” “ScrollDistance” “0”
xsetwacom set “Wacom Intuos BT S Pen stylus” “TapTime” “250”
Property ‘Wacom Proximity Threshold’ does not exist on device.
xsetwacom set “Wacom Intuos BT S Pen stylus” “Rotate” “none”
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Wheel Buttons’ does not exist on device.
Property ‘Wacom Strip Buttons’ does not exist on device.
Property ‘Wacom Strip Buttons’ does not exist on device.
Property ‘Wacom Strip Buttons’ does not exist on device.
Property ‘Wacom Strip Buttons’ does not exist on device.
xsetwacom set “Wacom Intuos BT S Pen stylus” “Threshold” “26”
xsetwacom set “Wacom Intuos BT S Pen stylus” “BindToSerial” “0”
xsetwacom set “Wacom Intuos BT S Pen stylus” “PressureRecalibration” “on”
xfce@anna-pc:~$ xsetwacom get all
Usage: xsetwacom [options] [command [arguments…]]
Options:
-h, --help - usage
-v, --verbose - verbose output
-V, --version - version info
-d, --display “display” - override default display
-s, --shell - generate shell commands for ‘get’
-x, --xconf - generate xorg.conf lines for ‘get’

Commands:
–list devices - display detected devices
–list parameters - display supported parameters
–list modifiers - display supported modifier and specific keys for keystrokes
–set “device name” parameter [values…] - set device parameter by name
–get “device name” parameter [param…] - get current device parameter(s) value by name
xfce@anna-pc:~ xsetwacom get "Wacom Intuos BT S Pen stylus" all Option "Area" "0 0 15200 9500" Button: Actions are not supported by xorg.conf. Try shell format (-s) instead. Button: Actions are not supported by xorg.conf. Try shell format (-s) instead. Button: Actions are not supported by xorg.conf. Try shell format (-s) instead. Button: Actions are not supported by xorg.conf. Try shell format (-s) instead. Button: Actions are not supported by xorg.conf. Try shell format (-s) instead. Option "DebugLevel" "0" Option "CommonDBG" "0" Option "Suppress" "2" Option "RawSample" "4" Option "PressCurve" "0 0 100 100" Option "Mode" "Absolute" Option "TPCButton" "off" Option "Touch" "off" Property 'Wacom Hardware Touch Switch' does not exist on device. Option "Gesture" "off" Option "ZoomDistance" "0" Option "ScrollDistance" "0" Option "TapTime" "250" Property 'Wacom Proximity Threshold' does not exist on device. Option "Rotate" "none" Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Wheel Buttons' does not exist on device. Property 'Wacom Strip Buttons' does not exist on device. Property 'Wacom Strip Buttons' does not exist on device. Property 'Wacom Strip Buttons' does not exist on device. Property 'Wacom Strip Buttons' does not exist on device. Option "Threshold" "26" Option "Serial" "0" Option "PressureRecalibration" "on" xfce@anna-pc:~ xsetwacom get “Wacom Intuos BT S Pad pad” all
Property ‘Wacom Tablet Area’ does not exist on device.
Button: Actions are not supported by xorg.conf. Try shell format (-s) instead.
Button: Actions are not supported by xorg.conf. Try shell format (-s) instead.
Button: Actions are not supported by xorg.conf. Try shell format (-s) instead.
Button: Actions are not supported by xorg.conf. Try shell format (-s) instead.
Option “DebugLevel” “0”
Option “CommonDBG” “0”
Option “Suppress” “2”
Option “RawSample” “4”
Property ‘Wacom Pressurecurve’ does not exist on device.
Option “Mode” “Absolute”
Property ‘Wacom Hover Click’ does not exist on device.
Option “Touch” “off”
Property ‘Wacom Hardware Touch Switch’ does not exist on device.
Option “Gesture” “off”
Option “ZoomDistance” “0”
Option “ScrollDistance” “0”
Option “TapTime” “250”
Property ‘Wacom Proximity Threshold’ does not exist on device.
Property ‘Wacom Rotation’ does not exist on device.
RelWheelUp: Actions are not supported by xorg.conf. Try shell format (-s) instead.
RelWheelDown: Actions are not supported by xorg.conf. Try shell format (-s) instead.
AbsWheelUp: Actions are not supported by xorg.conf. Try shell format (-s) instead.
AbsWheelDown: Actions are not supported by xorg.conf. Try shell format (-s) instead.
AbsWheel2Up: Actions are not supported by xorg.conf. Try shell format (-s) instead.
AbsWheel2Down: Actions are not supported by xorg.conf. Try shell format (-s) instead.
StripLeftUp: Actions are not supported by xorg.conf. Try shell format (-s) instead.
StripLeftDown: Actions are not supported by xorg.conf. Try shell format (-s) instead.
StripRightUp: Actions are not supported by xorg.conf. Try shell format (-s) instead.
StripRightDown: Actions are not supported by xorg.conf. Try shell format (-s) instead.
Option “Threshold” “0”
Option “Serial” “0”
Property ‘Wacom Pressure Recalibration’ does not exist on device.

edit: meanwhile I was able to assign scrollwheel up and down to the tablet’s first and second button but the tourble is that I need to press the buttons many times if I want to decrease or increase the brush size, leaving my finger on the button does not do anything i.e. increasing of decreasing does not continue