Indicates the Y coordinate (vertical) of the Display Manager's upper left corner if the Display Manager is not in full screen mode.
Related Variables: To set the X coordinate of the Display Manager's upper left corner, use the DispMgrX variable. To set the height of the Display Manager, use the DispMgrHeight and DispMgrWidth variables.
By default, the Display Manager is in full screen mode. This behaviour can be controlled using the DispMgrFullScreen variable.
Default: DispMgrY = 0