I find some small laptop which has a touchpad as numpad. Such as numpad asus and lenovo xiaoxin air 14. Those laptop can use touchpad as numpad.
I tried to install asus-touchpad-numpad-driver on my xiaoxin13 pro and install failed. Then I think there maybe a master who create an app to do same things. I tried libinput record and get the position coordinate on touchpad.
Before I spend time on develop an program to do that, I ask New Bing, it told me there is no such things and I can build one based on libinput. I think maybe New Bing know less, I want to ask you guys know any else program to do that thing?