Hi folks, The one very obvious change in how Athena behaves is how it plots normalized mu(E) spectra. If you dislike this new feature and would prefer to always see the normalized data as they were previously plotted, it is easy to disable by going to the preferences dialog, selecting the variable Bkg -> flatten, and setting it to false. Below is the description of this new feature from the NEWS page on my web site. B 1. FLATTENED DATA. I added a new features for plotting normalized spectra which I call flattening. In short, this works by subtracting the linear and quadratic portions of the polynomial regressed to the post-edge region of the data from the normalized data after the edge. This has the effect of shifting the oscillatory portion of the spectrum such that it oscillates about 1. That is, the flattened spectrum is presented with its baseline at 0 and it's post-edge at 1. This is purely a plotting device and has no impact on the calculation of chi(k). It can be turned on and off for a data set using a toggle button in the background removal section of the main window. Whether flattening is on or off by default is configurable in preferences dialog. Flattening is sensitive to how the post-edge line is chosen, particularly in XANES data which have a limited energy range. The idea for this feature was blatantly swiped from SixPack. -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu Code 6134, Building 3, Room 222 Naval Research Laboratory phone: (1) 202 767 5947 Washington DC 20375, USA fax: (1) 202 767 1697 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b National Synchrotron Light Source Brookhaven National Laboratory, Upton, NY 11973 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/