How is Default Email contact determined when sending Invoices?

I’m curious how the default contact email address is determined when sending Email PDF of invoices? Maybe it would be nice to include a “checkbox” under company contacts to determining “default for invoicing” individuals, There is already a “Primary contact” and “Default collaborator”…it’s not one of these , is it?


To set an email go to the customer and go to edit. Once on the edit page there is a field called ‘primary email’. Once you set it that will be the primary email. Screenshot below.


ahhh…thanks for the tip!