3 See [doc/keycode.txt](https://github.com/tmk/tmk_keyboard/blob/master/doc/keycode.txt).
4 Keycodes are actually defined in [common/keycode.h](https://github.com/tmk/tmk_keyboard/blob/master/common/keycode.h).
7 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'.
9 See [issue #168](https://github.com/tmk/tmk_keyboard/issues/168) and
10 - http://en.wikipedia.org/wiki/Magic_SysRq_key
11 - http://en.wikipedia.org/wiki/System_request
13 ## Power key doesn't work
14 Use `KC_PWR` instead of `KC_POWER` or vice versa.
15 - `KC_PWR` works with Windows and Linux, not with OSX.
16 - `KC_POWER` works with OSX and Linux, not with Windows.
18 http://geekhack.org/index.php?topic=14290.msg1327264#msg1327264
21 Solves my personal 'the' problem. I often got 'the' or 'THe' wrongly instead of 'The'. Oneshot Shift mitgates this for me.
22 https://github.com/tmk/tmk_keyboard/issues/67
24 ## Modifier/Layer stuck
25 Modifier keys or layers can be stuck unless layer switching is configured properly.
26 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.
28 https://github.com/tmk/tmk_keyboard/blob/master/doc/keymap.md#31-momentary-switching
29 http://geekhack.org/index.php?topic=57008.msg1492604#msg1492604
32 ## Mechanical Lock Switch Support
33 https://github.com/tmk/tmk_keyboard#mechanical-locking-support
35 This feature is for *mechanical lock switch* like this Alps one.
36 http://deskthority.net/wiki/Alps_SKCL_Lock
38 Using enabling this feature and using keycodes `LCAP`, `LNUM` or `LSCR` in keymap you can use physical locking CapsLock, NumLock or ScrollLock keys as you expected.
40 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 `CAPS`, `NLCK` and `SLCK`.***
43 ## Input special charactors other than ASCII like Cédille 'Ç'
44 NO UNIVERSAL METHOD TO INPUT THOSE WORKS OVER ALL SYSTEMS. You have to define **MACRO** in way specific to your OS or layout.
46 See this post for example **MACRO** code.
48 http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-120.html#p195620
50 On **Windows** you can use `AltGr` key or **Alt code**.
51 - http://en.wikipedia.org/wiki/AltGr_key
52 - http://en.wikipedia.org/wiki/Alt_code
54 On **Mac** OS defines `Option` key combinations.
55 - http://en.wikipedia.org/wiki/Option_key#Alternative_keyboard_input
57 On **Xorg** you can use `compose` key, instead.
58 - http://en.wikipedia.org/wiki/Compose_key
60 And see this for **Unicode** input.
61 - http://en.wikipedia.org/wiki/Unicode_input