This utility lets you draw using your laptop's touchpad.
Pressing any key or clicking the touchpad will finish the drawing.
Your touchpad will not control the cursor while drawing, though external mice should still work.
It has support for both X11 (all desktop environments), and Wayland (just Gnome at the moment).
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.