T_YRefPos
This is a Data Header variable.
Type = Float
T_YRefPos indicates the reference position for the Y axis (0.0 = bottom of screen, 1.0 = top of screen) when the measurement was taken.
The T_ variables describe the display setup when the trace was saved. When you recall and display a saved trace, the VSA uses the T_ variables to restore the display settings to their settings when the trace was saved.