Keycodes are actually defined in [common/keycode.h](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/keycode.h).
-## What Are The Default Keycodes?
+## What Are the Default Keycodes?
There are 3 standard keyboard layouts in use around the world- ANSI, ISO, and JIS. North America primarily uses ANSI, Europe and Africa primarily use ISO, and Japan uses JIS. Regions not mentioned typically use either ANSI or ISO. The keycodes corresponding to these layouts are shown here:
The key found on most modern keyboards that is located between `KC_RGUI` and `KC_RCTL` is actually called `KC_APP`. This is because when that key was invented there was already a key named `MENU` in the relevant standards, so MS chose to call that the `APP` key.
-## `KC_SYSREQ` isn't working
+## `KC_SYSREQ` Isn't Working
Use keycode for Print Screen(`KC_PSCREEN` or `KC_PSCR`) instead of `KC_SYSREQ`. Key combination of 'Alt + Print Screen' is recognized as 'System request'.
See [issue #168](https://github.com/tmk/tmk_keyboard/issues/168) and
- http://en.wikipedia.org/wiki/Magic_SysRq_key
- http://en.wikipedia.org/wiki/System_request
-## Power key doesn't work
+## Power Key Doesn't Work
Use `KC_PWR` instead of `KC_POWER` or vice versa.
- `KC_PWR` works with Windows and Linux, not with OSX.
- `KC_POWER` works with OSX and Linux, not with Windows.
More info: http://geekhack.org/index.php?topic=14290.msg1327264#msg1327264
-## Oneshot modifier
+## One Shot Modifier
Solves my personal 'the' problem. I often got 'the' or 'THe' wrongly instead of 'The'. Oneshot Shift mitgates this for me.
https://github.com/tmk/tmk_keyboard/issues/67
-## Modifier/Layer stuck
+## Modifier/Layer Stuck
Modifier keys or layers can be stuck unless layer switching is configured properly.
For Modifier keys and layer actions you have to place `KC_TRANS` on same position of destination layer to unregister the modifier key or return to previous layer on release event.
Old vintage mechanical keyboards occasionally have lock switches but modern ones don't have. ***You don't need this feature in most case and just use keycodes `KC_CAPS`, `KC_NLCK` and `KC_SLCK`.***
-## Input special charactors other than ASCII like Cédille 'Ç'
+## Input Special Characters Other Than ASCII like Cédille 'Ç'
NO UNIVERSAL METHOD TO INPUT THOSE WORKS OVER ALL SYSTEMS. You have to define **MACRO** in way specific to your OS or layout.
See this post for example **MACRO** code.
- http://en.wikipedia.org/wiki/Unicode_input
-## Apple/Mac keyboard Fn
+## Apple/Mac Keyboard `Fn`
Not supported.
Apple/Mac keyboard sends keycode for Fn unlike most of other keyboards.
https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/AppleHIDUsageTables.h
-## Media control keys in Mac OSX
-#### KC_MNXT and KC_MPRV does not work on Mac
+## Media Control Keys in Mac OSX
+#### KC_MNXT and KC_MPRV Does Not Work on Mac
Use `KC_MFFD`(`KC_MEDIA_FAST_FORWARD`) and `KC_MRWD`(`KC_MEDIA_REWIND`) instead of `KC_MNXT` and `KC_MPRV`.
See https://github.com/tmk/tmk_keyboard/issues/195
-## Keys supported in Mac OSX?
+## Keys Supported in Mac OSX?
You can know which keycodes are supported in OSX from this source code.
`usb_2_adb_keymap` array maps Keyboard/Keypad Page usages to ADB scancodes(OSX internal keycodes).
https://opensource.apple.com/source/IOHIDFamily/IOHIDFamily-606.1.7/IOHIDFamily/IOHIDConsumer.cpp
-## JIS keys in Mac OSX
+## JIS Keys in Mac OSX
Japanese JIS keyboard specific keys like `無変換(Muhenkan)`, `変換(Henkan)`, `ひらがな(hiragana)` are not recognized on OSX. You can use **Seil** to enable those keys, try following options.
* Enable NFER Key on PC keyboard
https://pqrs.org/osx/karabiner/seil.html
-## RN-42 Bluetooth doesn't work with Karabiner
+## RN-42 Bluetooth Doesn't Work with Karabiner
Karabiner - Keymapping tool on Mac OSX - ignores inputs from RN-42 module by default. You have to enable this option to make Karabiner working with your keyboard.
https://github.com/tekezo/Karabiner/issues/403#issuecomment-102559237
https://github.com/tekezo/Karabiner/issues/403
-## Esc and `~ on a single key
+## Esc and <code>`</code> on a Single Key
See the [Grave Escape](feature_grave_escape.md) feature.
-## Arrow on Right Modifier keys with Dual-Role
+## Arrow on Right Modifier Keys with Dual-Role
This turns right modifer keys into arrow keys when the keys are tapped while still modifiers when the keys are hold. In TMK the dual-role function is dubbed **TAP**.
```
Not sure what keycode Eject is on genuine Apple keyboard actually. HHKB uses `F20` for Eject key(`Fn+f`) on Mac mode but this is not same as Apple Eject keycode probably.
-## What's weak_mods and real_mods in action_util.c
+## What's `weak_mods` and `real_mods` in `action_util.c`
___TO BE IMPROVED___
real_mods is intended to retains state of real/physical modifier key state, while
weak_mods is ORed with real_mods when keyboard report is sent.
https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57
-## Timer functionality
+## Timer Functionality
It's possible to start timers and read values for time-specific events - here's an example: