Use this top-level local variables tab to define one or more local variables that you can then add to this field set. You can create multiple chained variables and add one or more of them to the field set.
To define a local variable:
On the Local Variables tab, click Add.
In the Name field, give the local variable a name.
In the Arguments section, enter appropriate arguments for the function you selected in the previous step.
In the Preview section, select or enter parameters and click Calculate to test the function results.
For complete instructions about constructing a variable, see Variables.
Tip: Tip: Fields in italics are derived from data in other fields. Derived fields appear in various places in the console, including on the Field Set Editor and the Common Conditions Editor (CCE) aggregation tabs (for example, Rules, Filters, and so forth). See also Using Field Sets.
You cannot add derived fields to the field set. If you want to add a derived field to a field set, add the parent field instead.