Hi All.
It is not possible to change the touch-pad’s scrolling direction, neither is it possible to turn the screensaver off. Despite being turned off in the Energy Saving settings, it keep appearing after some minutes of inactivity.
Plasma System Settings are notoriously difficult to navigate. The devs are aware of the issue, and they change the settings layout with almost every new release. This only worsens the problem.
Nevertheless, Plasma is great! You’ll get used to its quirks in time.
Regarding scrolling
Go to:
System Settings → Input Devices → Touchpad → Scrolling (tab)
and there you have “Reverse scrolling” two checkboxes, one for horizontal, one for vertical.
Thank you for the welcoming!
Now that I tried changing the scrolling direction again, the change stuck and reversing the scolling direction now works as it should. Thank you for the tip!