The string value of this attribute specifies the axis to which all of the "Per Axis" attributes apply. Therefore, to set the attributes of an individual axis, you must first set the value of CURRENT AXIS to that individual axis.
The allowed values for CURRENT AXIS are "X" and "Y". The X axis is always the one that scrolls. If the ORIENTATION attribute is set to "LEFT" or "RIGHT", the X axis will be the vertical one.
