Use an Input Dependency subnode () to make the specification in its parent node dependent on other user inputs.

Click the Add button () to add an input dependency to the table above. Choose an available Parameter, and from the list in the Dependency rule column, choose By value (the default) or By index in list to determine the rule for the expression that you add in the Expression column. Click the Delete button () to remove a dependency from the table. The following screenshot shows an example:

In this example, the first line the table means that the Laplace equation property will get the value (By value) from the LaplaceCondition property of a physics feature instance in the Model Builder. The third line means that the value of the Use SVD compression property will be set By index in list. In this case, Use SVD compression is a check box, which means that the list is [on, off]. Therefore, if the evaluation of the expression is equal to 0, Use SVD compression will be on; otherwise, it will be off.