As far as I can tell this isn’t currently possible. Basically, a formula that would UPDATEIF a specified field gets filled, with the current date/time.
I have several possible use cases. One example would be next to a signature field, which would fill in the date signed when the signature is added.
Obviously, TODAY() won’t work since it will keep updating every day. This needs to be a one-off time stamp when an event occurs - like a field is updated.
If there is some way to do this with current ragic functionality I’d appreciate to hear about it.