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qmk_firmware/docs/keycodes.md

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Overview

When defining a keymap each key needs a valid key definition.

This page documents the symbols that correspond to keycodes that are available to you in QMK.

Basic keycodes (0x00 - 0xFF)

Basic keycodes in QMK are based on HID Usage Keyboard/Keypad Page(0x07) with following exceptions:

  • KC_NO = 0 for no action
  • KC_TRNS = 1 for layer transparency
  • internal special keycodes in the 0xA5-DF range (tmk heritage).

Quantum keycodes (0x0100 - 0xFFFF)

Quantum keycodes allow for easier customisation of your keymap than the basic ones provide, without having to define custom actions.