We are using several custom layouts (WORD) in Business Central to create documents in the design we need.
A sample process: We create a new custom layout (e.g. Client specific invoice 1306 ), load it into BC via the "Custom layouts" screen and assign it to that client. It just WORKS
Now I want to give our accountant the chance to see the final layout of an invoice as a preview BEFORE the invoice is posted. I assumed that could be done with the "Draft Invoice"

But unfortunately it doesnt work as expected. I Always get the same standard form layout. Somehow it seems that i can't change the standard to my new custom layout for the draft invoice. I assume the draft invoice is report type 1303? If I create a new Layout for 1303; assign it to the customer and open the draft of an Invoice, BC still shows me the old report.
It gets even more confusing to me that if I create a report from the CUSTOM REPORT LAYOUTS screen with Process -> Run Report

I get the report in my new, edited custom layout..
Where am I doing wrong?