How do I specify a counterbore hole in a PCB?

Hello,

how do I specify a counterbore hole in the gerber files of a PCB?

Counterbore hole, as described in:  https://jlcpcb.com/blog/the-importance-and-types-of-countersink-holes-in-pcb-design

Do you have a "How To" guide? I cannot find any information in the JLCPCB Help Center -> PCB & Stencil  pages.

Best regards

Siggi