Figuring out what data keyboard events send
How are click and touch events represented? What does eg an Apple Pencil send? How does multi-touch work?
Multitouch tracker (Mouse, Touch and Pointer Events) with HUD
(Complete list at https://patrickhlauke.github.io/touch/)
How is rich text preserved in copy-pastes across apps? How about images? What data does the pasted window receive?
