Using Events options

Lookup and Select inputs have an Events option trigger a form action when a value change is made on a form. 

1. From a Lookup or Select input, expand Events.
   
2. Select the form action you want to execute when a value is changed.
3. Specify the map action results by selecting the response property and form field.
4. Mark Required if the event is required to be executed.
5. Click OK to save your entries. Click Cancel to close the window without saving changes.