Key Press Behaviors

Summary

The most basic of behaviors, is the ability to send certain keycode presses and releases in response to activating a certain key.

The categories of supported keycodes are:

• Keyboard
• Modifiers
• Keypad
• Editing
• Media
• Applications
• Input Assist
• Power & Lock

For advanced users, user-defined HID usages are also supported but must be encoded, please see dt-bindings/zmk/keys.h for further insight.

Keycode Defines

To make it easier to encode the HID keycode numeric values, most keymaps include the dt-bindings/zmk/keys.h header provided by ZMK near the top:

#include <dt-bindings/zmk/keys.h>

Doing so makes a set of defines such as A, N1, etc. available for use with these behaviors

Key Press

The "key press" behavior sends standard keycodes on press/release.

Behavior Binding

• Reference: &kp
• Parameter: The keycode usage ID from the usage page, e.g. N4 or A

Example:

&kp A