Editing Layer (section)

==Hardware layers==
Hardware layers are additional key bindings that are provided by the keyboard itself, which are transparent to the operating system. These bindings are typically activated by the [[Fn key]], which cannot be detected by the computer. In laptops, and compact keyboards such as the [[KBC Poker]] and [[HHKB|Happy Hacking Keyboard]], the Fn key allows physical keys to double up on functionality, with the computer believing that it is seeing dedicated keys.

For example, on many compact keyboards, instead of a physical F1 key, Fn+1 is typically mapped to F1 within the keyboard controller. The computer sees an identical signal to that which it would receive if a real F1 key existed and was pressed.

Because these layers are generally hard-coded into the controller, some keyboards provide [[DIP switch]]es to allow for limited reconfiguration.