Requirements for the Gesture Eraser to work:
The time interval between two fingers touching the screen does not exceed 200 milliseconds.
The maximum distance between two fingers does not exceed 55 mm, while the minimum is no less than 10 mm.
The fingers do not move more than 5 mm after touching the screen.
The fingers are placed in the valid area. (Outside the 67.5 degree area in the direction of pen tilt with the nib as the vertex.)
If three fingers touch the screen, the distance between the third finger and the other two fingers which activate the Gesture Eraser shouldn’t be more than 55 mm.