I have a hidden field (free form text) I use on different transaction forms. I want this field to always start off empty and various actions cause it to get populated. I have found when a certain person creates the transaction, that field has already been set. I see that if I make a copy of a transaction, (using Netusite's built in make a copy feature) those field values also get copied. Is there anyway to prevent this to make sure it always starts off blank? My solution was to make a user event on Event.Type Create and always set that field blank, but I feel like that is a bandaid for an improper setup.

You need the Event Type of COPY, not CREATE to clear it out in the case of COPY. I have done this before as well for custom fields that you need to be blanked out on COPY.

Are you sure? I tried on Create and it worked. My question was really is there a way in the UI to set this up that's defaulted to be blank and not dependent on User Event Scripts to fix things up.

Well the COPY button triggers UE type of COPY, so just handling on create will not clear it out. I don't think there is a field setting that overrides what COPY does.