Hi There, I have some assymetric peaks to fit, and I think I´d need to change the fitting function (as in GSAS I), but I cannot find where the option is. Any help? Thanks PABLO -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.aps.anl.gov/pipermail/gsas-ii/attachments/20161201/b5d74e45/attachment.html>