Comment 1 for bug 1842984

We can add this as a wishlist item for future development.

In Gerber(standard), I believe we would need to create a separate file for back-drilled vias. Gerber X2 and IPC-2581 should allow this natively.

For your current purposes, I would recommend picking a slightly different hole size for your back-drilled vias. Obviously, you will need to have unique sizes for each drill side and depth that you need back drilling for. Then, you can let your board house know the special instructions for that drill size. Alternatively, you can filter the drill size manually from the drill file into separate files that you would call out as Backdrill_Front_1-3.drl (for example)