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.
Is éard atá sa tairseach ná an fad is lú a bhogann an pointeoir sula dtéann an luasghéarú i bhfeidhm air. Má tá an ghluaiseacht níos lú ná an tairseach, bogfaidh an pointeoir mar a bheadh an luasghéarú socraithe a bheith 1X; mar sin, nuair a dhéanann tú gluaiseacht bheag leis an ngléas, níl aon luasghéarú ar bith, agus beidh rialú níos beaichte agat ar an bpointeoir. Le gluaiseachtaí níos mó, is féidir an pointeoir a bhogadh go tapa go dtí réigiúin eile ar an scáileán.