The most basic of behaviors, is the ability to send certain keycode presses and releases in response to activating
The most basic of behaviors, is the ability to send certain keycode presses and releases in response to activating
a certain key.
a certain key.
For reference on keycode values, see pages 83-89 of the [USB HID Usage Tables](https://www.usb.org/document-library/hid-usage-tables-12).
The categories of supported codes are:
- [Keyboard & Keypad](../codes/keyboard-keypad)
- [Editing](../codes/editing)
- [Media](../codes/media)
- [Applications](../codes/applications)
- [Input Assist](../codes/input-assist)
- [Power](../codes/power)
Please visit the [codes](../codes) section for a comprehensive list.
For advanced users, user-defined HID codes are also supported but must be encoded, please see [`dt-bindings/zmk/keys.h`](https://github.com/zmkfirmware/zmk/blob/main/app/include/dt-bindings/zmk/keys.h) for further insight.