Systems and methods for the configuration of channel state information reference signals are disclosed. The object of the invention is to modify a finger element such that the finger element in the active and passive functions thereof and in the dimensions thereof comes very close to a natural finger. Openings in the leading edge lead to one or more inflation chambers for ram air inflation during operation. The units are linked to one another via a bus with a ring topology. If desired, drops may be skipped to avoid depositing the alignment liquid multiple times on the same location on the substrate. The display controller controls the display to display an image indicating the position pointed by the pointer at position coordinates spaced by a predetermined distance from the position coordinates detected by the detector.