This article was converted by SimpRead; the original source is www.bilibili.com.
Below is the complete list of key combinations for the Keychron K3 keyboard. The original content is sourced from Keychron’s official English website and has been translated and compiled by the author.
Common Key Combinations
| Key Combination | Function |
|---|---|
fn + - |
Decrease lighting effect speed |
fn + = |
Increase lighting effect speed |
fn + 1 |
Select Bluetooth device #1 |
fn + 2 |
Select Bluetooth device #2 |
fn + 3 |
Select Bluetooth device #3 |
fn + 1 (hold for 3 seconds) |
Pair with Bluetooth device #1 |
fn + 2 (hold for 3 seconds) |
Pair with Bluetooth device #2 |
fn + 3 (hold for 3 seconds) |
Pair with Bluetooth device #3 |
fn + Lighting Key |
Toggle backlight on/off |
fn + Right Arrow (RGB backlight models only) |
Change backlight color |
fn + Left Arrow (RGB backlight models only) |
Change backlight color |
fn + Del |
Insert key |
fn + F1–F12 (Mac mode) |
F1–F12 keys |
fn + F1 (Windows mode) |
Decrease screen brightness |
fn + F2 (Windows mode) |
Increase screen brightness |
fn + F3 (Windows mode) |
Open multitasking interface |
fn + F4 (Windows mode) |
Open home folder |
fn + F5 (Windows mode) |
Decrease keyboard backlight brightness |
fn + F6 (Windows mode) |
Increase keyboard backlight brightness |
fn + F7 (Windows mode) |
Rewind |
fn + F8 (Windows mode) |
Play/Pause |
fn + F9 (Windows mode) |
Fast forward |
fn + F10 (Windows mode) |
Mute |
fn + F11 (Windows mode) |
Decrease volume |
fn + F12 (Windows mode) |
Increase volume |
fn + Win (Windows mode, hold for 3 seconds) |
Lock/Unlock Windows key |
Other Key Combinations
| Key Combination | Function |
|---|---|
fn + B |
View keyboard battery level (experimental feature; accuracy not guaranteed) RGB backlight models: Red backlight = 0–30% battery Blue backlight = 30–70% battery Green backlight = 70–100% battery White backlight models: Two rows of backlight off & others lit = 0–30% battery One row of backlight off & others lit = 30–70% battery All backlight lit = 70–100% battery No-backlight models: 1 key red LED lit = 0–30% battery1 & 2 keys red LEDs lit = 30–70% battery1, 2, & 3 keys red LEDs lit = 70–100% battery |
fn + L + Lighting Key (hold for 3 seconds) |
Lock/Unlock lighting effect cycling |
fn + S + O (Bluetooth mode, hold for 3 seconds) |
Enable/Disable auto-sleep mode |
fn + S + L + R (Bluetooth mode, hold for 3 seconds) |
Auto-sleep after 10 minutes of inactivity |
fn + S + L + T (Bluetooth mode, hold for 3 seconds) |
Auto-sleep after 20 minutes of inactivity |
fn + S + L + Y (Bluetooth mode, hold for 3 seconds) |
Auto-sleep after 30 minutes of inactivity |
fn + J + Z (hold for 3 seconds) |
Reset keyboard (restore factory settings) |
fn + X + L (Windows mode, hold for 3 seconds) |
Toggle default function of F1–F12 keys (Fn mode / multimedia mode) |
fn + K + C (Mac mode, hold for 3 seconds) |
Toggle default function of F1–F12 keys (affects F5 and F6 only) |
fn + I + D (hold for 3 seconds) |
Toggle between Delete and Insert keys |
Closing Remarks
The author purchased the Keychron K3 keyboard at the end of 2022. Upon receiving it, they discovered the keyboard lacks a dedicated Insert key — a key frequently required for work tasks such as copy-pasting in Linux terminals.
The author carefully reviewed both the quick-start guide and the full manual included in the packaging but found no mention of how to access the Insert key via key combinations. Moreover, the manual provided no detailed explanation of the keyboard’s fn-based key combinations. (“What good is this manual, then? = =”)
Next, the author contacted Keychron’s official customer service on Taobao. The representative replied that Insert can be accessed using fn+Del. However, when the author asked for the complete list of key combinations, no further response was provided.
Finally, through persistent effort — and thanks to Google — the author located an official Keychron blog post detailing all key combinations for this keyboard: https://www.keychron.com/blogs/news/k3-key-combinations.
Why is such a fundamental page — one explaining basic keyboard functionality — so deeply buried? The keyboard’s manual doesn’t even include the complete list (it’s not that long, after all!), and to date, no Chinese internet platform offers a comprehensive reference for these key combinations. Although physical layout constraints necessitate some functions being accessible only via key combinations, providing users with full documentation is a basic responsibility and sign of respect from any keyboard manufacturer.
Withholding full functional documentation from the manual — and failing to provide responsible, thorough responses to user inquiries — is clearly inappropriate for a keyboard marketed as “for Peak Productivity” and boasting “100% Productivity”.
Keyboard promotional page: “100% Functionality”, “100% Productivity”