1. A computer-implemented method using a display of a device, the display capable of having at least a first window, the method comprising: acquiring measurements, by the device, regarding more than one volitional inputs of a user, the measurements from sensing a physical attribute associated with the user by an imaging sensor of the device, the sensor being configured to be detached from the physical attribute associated with the user to sense at least the physical attribute; analyzing, by the device, the measurements; determining, by the device, from the analyzing the measurements that the volitional inputs are for a position in the first window of the display; and setting, by the device, materials for presentation in the first window of the display in view of the volitional inputs being for the position in the first window as determined by the determining, wherein at least the imaging sensor and the display are configured to have a preset relationship to help the determining.