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The Key combinations table of Keychron K4

For the Keychron K4, we’ve included all the normal and useful function keys that can be accessed via the key combinations. Here is the table for all the key combinations and functions it can access.

Keychron K4 version 2 hot swappable wireless mechanical keyboard 96 percent layout for Mac Windows iOS Gateron switch red with type C RGB white backlight

fn + Keys

KeysFunction
fn + 1
Select Bluetooth device #1
fn + 2
Select Bluetooth device #2
fn + 3Select Bluetooth device #3
fn + 1 (long press for 3s)Pair with Bluetooth device #1
fn + 2 (long press for 3s)Pair with Bluetooth device #2
fn + 3 (long press for 3s)Pair with Bluetooth device #3
fn + Light Effect KeyTurn On / Off the Backlight 
fn + Right Arrow (Only works for RGB-backlit version)Change The Backlight Color 
fn + Left Arrow (Only works for RGB-backlit version)Change The Backlight Color
fn + F1 (Mac mode)F1
fn + F2 (Mac mode)F2
fn + F3 (Mac mode)F3
fn + F4 (Mac mode)F4
fn + F5 (Mac mode)F5
fn + F6 (Mac mode)F6
fn + F7 (Mac mode)F7
fn + F8 (Mac mode)F8
fn + F9 (Mac mode)F9
fn + F10 (Mac mode)F10
fn + F11 (Mac mode)F11
fn + F12 (Mac mode)F12
fn + F1 (Windows mode)Screen Brightness Down
fn + F2 (Windows mode)Screen Brightness Up
fn + F3 (Windows mode)Launches Mission Control
fn + F4 (Windows mode)Launchpad
fn + F5 (Windows mode)Keyboard Backlight Down
fn + F6 (Windows mode)Keyboard Backlight Up
fn + F7 (Windows mode)Rewind
fn + F8 (Windows mode)Play / Pause
fn + F9 (Windows mode)Fast Forward
fn + F10 (Windows mode)Sound: Volume Mute
fn + F11 (Windows mode)Sound: Volume Down
fn + F12 (Windows mode)Sound: Volume Up
fn + delInsert

More key combinations

KeysFunction
fn + B
Check Battery (Still in Beta, not 100% accurate) 

RGB-Backlight Version
Backlight Red = 0~30% Power
Backlight Blue = 30%~70% Power 
Backlight Green = 70%~100% Power

White-Backlight Version
Two Rows Backlight off & the Other On = 0~30% Power
One Row Backlight off & the Other On= 30%~70% Power 
All Backlight On = 70%~100% Power
fn+ L + Light Effect Key (long press for 3s)Lock / Unlock the Backlight Effect
fn + S + O (Bluetooth mode, long press for 3s)Disable / Enable the Auto Sleep Mode
fn + S + L + R (Bluetooth mode, long press for 3s)Auto Sleep in 10 Minutes Without Typing
fn + S + L + T (Bluetooth mode, long press for 3s)Auto Sleep in 20 Minutes Without Typing
fn + S + L + Y (Bluetooth mode, long press for 3s)Auto Sleep in 30 Minutes Without Typing
fn + J + Z (long press for 3s)Reset the Keyboard
fn + X + L (Windows mode, long press for 3s)
Switch Between Function Keys and Multimedia keys (F1-F12)
fn + K + C (Mac mode, long press for 3s)Switch Between Function Keys and Multimedia Keys (Only works for F5 and F6)
fn + I + D (long press for 3s)Switch Between the Delete Key and the Insert Key