I think I´ve seen an answer to this but can´t find it now - maybe I just dreamt it
I have a multiselect field on the Contacts record (field B).
The same dropdown list is in a field on the Accounts record (field A).
When creating a new Contact, I want to give field B a default value that is the same as in the field A (on it´s Accounts related record). Basically field B = field A at that point.
How can I achieve taht?