Indicator that a field is a formula in Rules Engine

A formula used in a Transformation task in a rule shows as the output label in the Show area. It would be helpful to have some sort of indicator that is based on a formula (similar to how Data Management has a little blue f when it is a formula field).

It can be difficult to know from a glance whether a field is a formula or has just been relabeled without clicking the gear next to field.

Most helpful would be an indicator or hover over text that would display the type of formula field.