6
There should be an option to select Draft Invoice in Document Layouts drop down list to define Customer specific Custom Layout Description for it.
Currently only the below options are available are
Quote
Confirmation Order
Invoice
Credit Memo
Customer Statement
Job Quote
Reminder
Shipment

Draft Invoice is missing.
Category: Sales
STATUS DETAILS
Needs Votes
Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future. Best regards, Business Central Team