Creo Simulate > Reference Links > Parameter-Capable Edit Fields
  
Parameter-Capable Edit Fields
When an edit field is parameter-capable, you can specify the name of a Creo Parametric parameter. Creo Simulate uses the value of the parameter in the computation.
A right-click on a parameter-capable option displays a menu. Click Parameter on this menu to open the Select Parameter dialog box. If no Creo Parametric parameters are defined, the data form appears but does not list any parameters. If Creo Parametric parameters are defined, you can select one from the displayed list. Creo Simulate then displays the parameter you select in the edit field.
If the value of any parameter is out of range for the specific field, Creo Simulate accepts the value but displays a warning message.