Sorry, didn’t spot the ‘enter key’ .. replied initially based on ‘press a button’ ..
but this isn’t a ‘form’ that is doing this I’m afraid. it is part of the actual ‘application’ side.
but even so, you can could do this by running a script on one of the ‘events’ of that field. check it out perhaps first by using the ‘show message’ script to see which is the best ‘event’ that suits your requirements. Then its just a matter of replacing that ‘show message’ with whatever behaviours you are looking to run