1. A computer implemented method of erasing user input displayed in a graphic widget positioned on a background of an interactive input system comprising: detecting contact of a new touch point at a location coinciding with the graphic widget; tracking the new touch point associated with the graphic widget; and in the event that the new touch point that is associated with the graphic widget crosses an edge of the graphic widget as it is moved from a location coinciding with the graphic widget to a location outside of the graphic widget, erasing the user input displayed in the graphic widget.