Menu: View→Analysis Properties→Permutations→Number of random permutations
The number of random permutations to obtain when a permutations tests is performed and the Random permutations option is selected.
For more information, see the Permute method of the AmosEngine class.
Programming
In Amos Graphics programs, you can fill this text box with "500" by using the following statement (Visual Basic):
pd.GetTextBox("AnalysisPropertiesForm", "PermuteText").Text = "500"