There is something I still don't understand with custom child record sublists. Now the Electronic Invoice bundle creates a custom record "Customer E-Document Email Recipient"

customrecord_psg_ei_email_recipient

Which has a field called Customer

custrecord_psg_ei_email_recipient_cust

which has the

Record is Parent

checkbox checked. (so this is the field that establishes the parent/child relationship between "Customer" and "Customer E-Document Email Recipient") And another field called Contact

custrecord_psg_ei_email_recipient_cont

which is a List/Record of the standard record

contact

Now if I click + on a new line of that sublist, it opens the Contact form... how did the system know that this if the form it should open? It just open the record of the other field that the one which establishes the parent/child relationship? That would be super weird? What if the custom child record had more than two fields?

are you asking why there is a button to add a new contact

I am asking why it opens the Contact form specifically? How did the system know that this is the form that it should open?

what kind of form would you expect a contact to be created in?

How did it know that it should create a contact in the first place?

custrecord_psg_ei_email_recipient_cont

is a contact field, that new button adds a contact to that list

Let's say the child record had another field that is a List/Record of Address for example... now, which form will be opened?

none, you cant add addresses

It is not the point

if your question is

Let's say the child record had another field that is a List/Record of x for example... now, which form will be opened?

x and Contact

There would be another column in the sublist that would have the Address field from the child record

Which one then?

you will have two fields

aha, and each field will open its form