I am configuring the crowdsource reporter template, and I was wondering if there is a way to automatically populate a field in my comment table as the difference of two numeric fields that users enter into the app. Ideally, users would click on the Comment or Submit Report button and see three blank fields--field1, field2, and field3. They enter numbers into field1 and field2, then field3 displays !field1!-!field2! automatically. How can I make this happen? Can I create an expression for the default value?
