How long the hand must stay open to lift the pen. Higher = a brief hand-wobble won't break a line; lower = snappier.

For distance. If the child sits far from the camera and the cursor barely moves, raise this. If it's too twitchy, lower it.

Default is the opposite: fist/pinch draws, open hand moves. Pick whichever the child finds easier.

Scales the whole app. Lower it if the toolbar is too big for this screen; raise it to make everything bigger. Saved on this device.