Where is the model value symmetry set specified in the Toolbox?

[Andrew Wilcox <andrew...@xxxxxxxxx>]

The Toolbox version 1.5.2 help says

We can use the Symmetry set option of the What is the model? section of the Model Overview Page to declare this set of model values to be a symmetry set of the behavior spec.

I'm not seeing a "Symmetry set" option in either the "Model Overview" or the "Advanced Options" tabs though, where would I find it?

Thanks!

Andrew