Introductionsynaptiks provides a System Settings module for touchpad configuration and a little touchpad management tool.
The System Settings module configures the touchpad, including:
Cursor motion speed settings
Edge scrolling
Two finger scrolling
Circular scrolling (which allows you to scroll by moving your fingers in circles across the touchpad, much less tedious than edge scrolling in my opinion)
Tapping settings (e.g. which mouse buttons are triggered by tapping into touchpad corners or with multiple touchpad)
It is located in System Settings under → .
The touchpad management tool resides in the system tray and provides a global hotkey to conveniently switch the touchpad on or off. It can also do so automatically while you are typing, or if you plug in an external mouse:
It is available in the KDE menu under → → .