thanks tim... atlast i got it. i m finding problems with the peak copy function. now i m analysisng the dna noesy spectra. so i want to just copy my peaks from one mixing time to the other and then propagate assignments. *but the copy function doesnt seem to copy all peaks. is there a pick finding parameter set for copying peaks as well?? *from the main menu i have options to copy all the peaks from one spectrum to the other. how to i just copy selected peaks. thanks karthik