If checked, the peak being assigned will be highlighted in a spectrum display If non-zero, this will cause a number of iterations with pseudo-random start values for the coupling constants If set, this will cause all possible combinations of coupling constant signs to be tested in iteration In assignments, peaks can be ordered for increasing or decreasing frequency Tolerance for grouping closeby peaks (in Hz) If checked, closeby peaks will be grouped for assignments For long peak lists, peaks weaker than Thresh times the highest peak will not be included in assignments Determine how the "smearing" factor will change from one iteration to the next. Use large values to reduce the number of cycles Determines "smearing" in the first full-lineshape iteration cycle; smaller values give stronger smearing. Use negative values for bi-exponential smearing Activate these Iterate Options Discard any changes to the Iterate Options Change Iterate and assignment options