Hello, peak picking by clicking in a window with proton and carbon axes (in this case) makes a peak with a 1.000 ppm proton value in the z-dimension. A H-H window with carbon as z picks as expected. This behaviour does not happen with a 26th of June backup of the source tree, so was introduced with July updates. Regards -- Tolga Helmbrecht Leibniz-Institut für Molekulare Pharmakologie (FMP) Abt. NMR-unterstützte Strukturforschung AG Solution NMR Robert-Roessle-Str. 10 13125 Berlin Germany Tel. +49-30-94793-231 Fax +49-30-94793-230 Web http://www.fmp-berlin.de/solutionnmr.html E-Mail [log in to unmask]