How to lock UDFs? v2016: creating CI_Item UDFs. Want data to flow into SO Detail History and AR Invoice History Detail. The data does not need to be viewed by users; if the fields must be viewable, they should not be editable. I believe the fields need to be placed on the panels in order for the data to flow, but I can't find how to lock them (I'm working on SO Detail now). They are not showing up as available to hide. None of the fields are date fields. If they have to be viewable, I'll put them on the secondary grid. What am I missing?