The threshold is the smallest distance that the mouse pointer must move on the screen before acceleration has any effect. If the movement is smaller than the threshold, the mouse pointer moves as if the acceleration was set to 1X; thus, when you make small movements with the physical device, there is no acceleration at all, giving you a greater degree of control over the mouse pointer. With larger movements of the physical device, you can move the mouse pointer rapidly to different areas on the screen.
A tolerancia é a distancia mínima que debe percorrer o punteiro na pantalla antes de que a aceleración faga efecto. Se o movemento é menor que o valor da tolerancia, a aceleración adquirida será de 1X; así, cando faga movementos pequenos co dispositivo físico, non haberá aceleración e facilitarase o control do rato en espazos pequenos. Con movementos máis longos do dispositivo físico, vostede poderá mover o punteiro rapidamente a diferentes áreas da pantalla.