Beveling is a card edge milling operation, with a specific angle, for example to facilitate the insertion of a card on a connector.
It is often linked to goldfinger option. This operation can only be performed on a linear side.
For ISA and PCI cards, the bevel is standardized:
Taili-PCB offers 3 angles:20 / 30 / 45°on the TOP and / or BOT sides