I do not use most of the default fields and wonder if it is possible to trim the list ?
See the functions in the menu of the little right-arrow next to the dropdown list.
Once again and oh so simple
Thank-you 
btw , I'm guessing it's a one by one process ?
being a lazy git if there's a way to select more than one at a time to remove ?
It's one by one or all in one go.
But the fields return, once you have typed them in or used existing ones for editing.
Got it , cheers
and now I need 20 characters to validate this post
BTW there are 2 solutions in this thread BUT the software will only let me nominate one 