I have XY plot (Pressure and flow) coming for Gas Turbine OEM as performance reference, I inserted this static XY plot in Process Book thru Excel sheet as ODBC source, it is ok and reflecting this static XY plot accurately . Now I want to read two tags (Pressure & Flow) from DCS / PI server, and present the relation between them in XY plot. to compare acctual performance with OEM XY plot (static one). I tried to find a way with the XY plot in PB but X axis is reading from one source only. Now Can I have two trasperant layers of XY plots one can read from static OEM data and other read from dynamic tags of PI server?