Hello from Texas, Can somebody tell me the control card (term) that tells GSAS to read in esd data? BTW, when I used powder V2.0 to convert GSAS esd data to std data, the pattern got flatten out.(The data was manipulated, Ugh!). Sean X. Ouyang PhD Department of Chemistry Texas A&M Univesity College Station,TX77843 ouyang...@mail.chem.tamu.edu