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Home.md
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Home.md
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@ -238,95 +238,11 @@ You can then override any settings, rather than having to copy and paste the who
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# Going beyond the keycodes
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Aside from the [basic keycodes](https://github.com/qmk/qmk_firmware/blob/master/doc/keycode.txt), your keymap can include shortcuts to common operations.
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Aside from the [basic keycodes](https://github.com/qmk/qmk_firmware/wiki/Keycodes), your keymap can include shortcuts to common operations.
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## Quick aliases to common actions
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Your keymap can include shortcuts to common operations (called "function actions" in tmk).
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These functions work the same way that their `ACTION_*` functions do - they're just quick aliases. To dig into all of the tmk `ACTION_*` functions, please see the [TMK documentation](https://github.com/qmk/qmk_firmware/blob/master/doc/keymap.md#2-action).
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Instead of using `FNx` when defining `ACTION_*` functions, you can use `F(x)` - the benefit here is being able to use more than 32 function actions (up to 4096), if you happen to need them.
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### Switching and toggling layers
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`MO(layer)` - momentary switch to *layer*. As soon as you let go of the key, the layer is deactivated and you pop back out to the previous layer. When you apply this to a key, that same key must be set as `KC_TRNS` on the destination layer. Otherwise, you won't make it back to the original layer when you release the key (and you'll get a keycode sent). You can only switch to layers *above* your current layer. If you're on layer 0 and you use `MO(1)`, that will switch to layer 1 just fine. But if you include `MO(3)` on layer 5, that won't do anything for you -- because layer 3 is lower than layer 5 on the stack.
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`OSL(layer)` - momentary switch to *layer*, as a one-shot operation. So if you have a key that's defined as `OSL(1)`, and you tap that key, then only the very next keystroke would come from layer 1. You would drop back to layer zero immediately after that one keystroke. That's handy if you have a layer full of custom shortcuts -- for example, a dedicated key for closing a window. So you tap your one-shot layer mod, then tap that magic 'close window' key, and keep typing like a boss. Layer 1 would remain active as long as you hold that key down, too (so you can use it like a momentary toggle-layer key with extra powers).
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`LT(layer, kc)` - momentary switch to *layer* when held, and *kc* when tapped. Like `MO()`, this only works upwards in the layer stack (`layer` must be higher than the current layer).
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`TG(layer)` - toggles a layer on or off. As with `MO()`, you should set this key as `KC_TRNS` in the destination layer so that tapping it again actually toggles back to the original layer. Only works upwards in the layer stack.
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`TO(layer)` - Goes to a layer. This code is special, because it lets you go either up or down the stack -- just goes directly to the layer you want. So while other codes only let you go _up_ the stack (from layer 0 to layer 3, for example), `TO(2)` is going to get you to layer 2, no matter where you activate it from -- even if you're currently on layer 5. This gets activated on keydown (as soon as the key is pressed).
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### Fun with modifier keys
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* `LSFT(kc)` - applies left Shift to *kc* (keycode) - `S(kc)` is an alias
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* `RSFT(kc)` - applies right Shift to *kc*
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* `LCTL(kc)` - applies left Control to *kc*
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* `RCTL(kc)` - applies right Control to *kc*
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* `LALT(kc)` - applies left Alt to *kc*
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* `RALT(kc)` - applies right Alt to *kc*
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* `LGUI(kc)` - applies left GUI (command/win) to *kc*
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* `RGUI(kc)` - applies right GUI (command/win) to *kc*
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* `HYPR(kc)` - applies Hyper (all modifiers) to *kc*
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* `MEH(kc)` - applies Meh (all modifiers except Win/Cmd) to *kc*
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* `LCAG(kc)` - applies CtrlAltGui to *kc*
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You can also chain these, like this:
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LALT(LCTL(KC_DEL)) -- this makes a key that sends Alt, Control, and Delete in a single keypress.
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The following shortcuts automatically add `LSFT()` to keycodes to get commonly used symbols. Their long names are also available and documented in `quantum/quantum_keycodes.h`.
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KC_TILD ~
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KC_EXLM !
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KC_QUES ?
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KC_AT @
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KC_HASH #
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KC_DLR $
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KC_PERC %
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KC_CIRC ^
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KC_AMPR &
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KC_ASTR *
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KC_LPRN (
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KC_RPRN )
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KC_UNDS _
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KC_PLUS +
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KC_DQUO "
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KC_LCBR {
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KC_RCBR }
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KC_LABK <
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KC_RABK >
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KC_PIPE |
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KC_COLN :
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`OSM(mod)` - this is a "one shot" modifier. So let's say you have your left Shift key defined as `OSM(MOD_LSFT)`. Tap it, let go, and Shift is "on" -- but only for the next character you'll type. So to write "The", you don't need to hold down Shift -- you tap it, tap t, and move on with life. And if you hold down the left Shift key, it just works as a left Shift key, as you would expect (so you could type THE). There's also a magical, secret way to "lock" a modifier by tapping it multiple times. If you want to learn more about that, open an issue. :)
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`MT(mod, kc)` - is *mod* (modifier key - MOD_LCTL, MOD_LSFT) when held, and *kc* when tapped. In other words, you can have a key that sends Esc (or the letter O or whatever) when you tap it, but works as a Control key or a Shift key when you hold it down.
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These are the values you can use for the `mod` in `MT()` and `OSM()` (right-hand modifiers are not available for `MT()`):
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* MOD_LCTL
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* MOD_LSFT
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* MOD_LALT
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* MOD_LGUI
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* MOD_HYPR
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* MOD_MEH
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These can also be combined like `MOD_LCTL | MOD_LSFT` e.g. `MT(MOD_LCTL | MOD_LSFT, KC_ESC)` which would activate Control and Shift when held, and send Escape when tapped.
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We've added shortcuts to make common modifier/tap (mod-tap) mappings more compact:
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* `CTL_T(kc)` - is LCTL when held and *kc* when tapped
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* `SFT_T(kc)` - is LSFT when held and *kc* when tapped
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* `ALT_T(kc)` - is LALT when held and *kc* when tapped
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* `GUI_T(kc)` - is LGUI when held and *kc* when tapped
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* `ALL_T(kc)` - is Hyper (all mods) when held and *kc* when tapped. To read more about what you can do with a Hyper key, see [this blog post by Brett Terpstra](http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/)
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* `LCAG_T(kc)` - is CtrlAltGui when held and *kc* when tapped
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* `MEH_T(kc)` - is like Hyper, but not as cool -- does not include the Cmd/Win key, so just sends Alt+Ctrl+Shift.
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Your keymap can include shortcuts to common operations (called "function actions" in tmk). To learn more about them check out the [Key Functions](Key-Functions) page.
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## Space Cadet Shift: The future, built in
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