Menu: View→Analysis Properties→Bias→Covariances to be analyzed→Maximum likelihood
Fits the sample covariance matrix that is the maximum likelihood estimate (rather than the unbiased estimate).
For more information, see the FitMLMoments method of the AmosEngine class.
Programming
In Amos Graphics programs, you can select this option by using the following statement (Visual Basic):
pd.GetRadioButton("AnalysisPropertiesForm", "OptionUseBias_ML").Checked = True