Features

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Caps Word

Activate: Alt + CAPS_MOD (tap) Deactivate: Same combination, or press any non-word key, or complete a word (Space, Enter, etc.)

Caps Word is a "smart" uppercase mode. Once active, every letter key you press is automatically capitalised -- but Caps Word turns itself off the moment you press a key that doesn't belong in a word, such as Space, Enter, Tab, or punctuation. This makes it ideal for typing ALL_CAPS_CONSTANTS or MY_VARIABLE_NAME without fumbling with Shift.

Keys that keep Caps Word active (do not terminate it):

Letters (A-Z)
Digits (0-9)
Backspace
- and _ (useful for SCREAMING_SNAKE_CASE)

Keys that terminate Caps Word:

Space, Enter, Tab, Escape
Most punctuation

LED indicator: The CapsLock key LED lights green while Caps Word is active.

Autocorrect

Toggle: GUI + CAPS_MOD (tap)

QMK's built-in autocorrect silently fixes common typos as you type. It uses a dictionary of known mistyped sequences and replaces them on the fly as soon as the full misspelling is detected.

Autocorrect runs entirely on the keyboard -- no software is needed on the host computer. It works in any application that accepts keyboard input.

LED indicator: The CapsLock key LED lights purple while autocorrect is disabled. When autocorrect is on (default), the LED is off (or shows CapsLock/CapsWord state if those are active).

Combos

Combos trigger an action when multiple keys are pressed simultaneously (within a short window).

Fallback to BASE

Keys	Action
`,` + `.` + `/`	`TO(BASE)` -- immediately switch to the BASE layer, clearing all layer state

This is an emergency escape: if you get stuck in an unexpected layer state and don't remember how to get back, just mash the three bottom-right keys of the main cluster at the same time.

The combo is defined to trigger from any layer -- the keycodes are resolved against BASE, so it fires regardless of what layer is currently active.

Tap Dance -- Home/End

Location: The Home/End key in the right navigation cluster (numpad row)

Taps	Output	Tapping term
Single tap	`Home`	175 ms
Double tap	`End`	175 ms

The 175 ms tapping term for this key is deliberately shorter than the global tapping term so the double-tap feels snappy and natural.

On FN1 layer, the Home/End key outputs a plain End instead of the tap-dance, and the arrow keys map to Home/End directly.

N-Key Rollover (NKRO)

Toggle: NK_TOGG key on the KEEB_CTL layer (FN1+5, then N key)

By default the keyboard operates in 6KRO (6-key rollover) mode for compatibility. Pressing NK_TOGG switches to full NKRO mode, which allows any number of simultaneous keypresses to be registered. Press NK_TOGG again to revert to 6KRO.

VIA / Keychron Launcher

The firmware is built with VIA support enabled. This means you can remap any key, adjust lighting, and manage macros live without reflashing the firmware, using either:

Keychron Launcher -- Keychron's own browser-based configuration tool
VIA -- the universal QMK configurator at usevia.app

Changes made through VIA/Launcher are saved to the keyboard's EEPROM and persist across power cycles. The firmware's 6 layers are all editable through VIA.

Raw HID Host Bridge

The keyboard maintains a bidirectional communication channel with a host-side application over USB HID. This allows:

Layer sync: The host app receives the current active layer whenever it changes, and can also push layer changes to the keyboard.
Volume / brightness reporting: The host can report system volume and screen brightness to the keyboard for future RGB indicator use.
Active app detection: Planned for a future update.

This feature is transparent during normal use -- it only activates when the companion host application is running.

Debounce

The firmware uses QMK's sym_defer_pk debounce algorithm (symmetric, per-key, deferred). This algorithm reduces false keypresses from switch bounce while minimising input latency compared to the default symmetric eager approach. It is particularly effective for the Q5 Max's Gateron mechanical switches.