I often use thumbs to control cursor via touchpad while doing 10-finger touch typing. On Windows and macOS I can configure one finger scroll: if some hotkey is pressed I move thumb over the touchpad to scroll up, down, left and right. This is handy since I don't need to move my entire hand in order for 2-finger scroll.
Is it possible to somehow configure the same behaviour with the latest Ubuntu desktop? I know about the "1-finger edge scrolling" but I want 1-finger scroll for the entire touchpad while hotkey is pressed, since touchpad edges are hard to reach without removing my hand(s) from the 10-finger touch typing position.
Customization options are limited with
libinputin Wayland ... But, the following should work out of the box ...Enable two-finger scrolling for your touchpad:
... and use your other thumb as a trigger (hotkey/hot-thumb) by simply placing it on the touchpad ... That is e.g. left thumb moving on the touchpad will move the pointer but, if you do that while your right thumb is touching and holding on the touchpad, then that will change your left thumb movements up/down and left/right into scrolling action instead.
Notice that your mileage may vary depending on the sensitivity of your touchpad hardware.